I was having the exact same issue as Rucci had on the 26 Jul 2012. My fix for this was to comment out lines: 399, 400, 401, 402, 403. That seems to work for me.

Hi All. I ran the same code in release 2017b that I used in release 2017a (Could not get it to work). All worked well. Why? I don't know .

Anyone else getting the same error and if so , is there a solution ??

Error using jsondecode
JSON text must be a character vector.

I like many others could not save my credentials. The error that Enrcio De Santis got on Feb 7 2017 kept occurring again and again. I tried his fix dated Feb 8. This was on a windows 10 laptop. I tried again on a Windows 8 laptop. Worked first time. I dont know why but it seems to be a Java issue (obviously)

Hello, twitty works fine and i can post a new status in my twitter but how can i post a new status with a picture or a gif or a video attached to my tweet and add linked account to this picture ?

Hello,
I'm trying tw = twitty(credentials), but receive error, "The supplied credentials are not valid."
i have also created twitter developer app successfully but i still have error.
Can anyone help me please?

I found where is my issue in the post below related to the 401 error using streaming APIs. Now twitty works well. If there aren't other authentication issues, a problem can arise if the time measured by your machine (UNIX time) is different from the time measured on twitter streaming servers. Be sure that your time is set to be synchronized automatically through an internet timing server (SNTP) ('set time automatically" in Win7/10 settings).

Hello, this tool is fantastic! However I'm trying to use the streaming API and I'm getting the following error (the authentication through the standard API (e.g. tw.search...)) works well with no errors):

Error using twitty/callTwitterAPI (line 1974)
Java exception occurred:
java.io.IOException: Server returned HTTP response code: 401 for URL:
https://stream.twitter.com/1.1/statuses/filter.json

at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)

at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)

Error in twitty/filterStatuses (line 807)
S = twtr.callTwitterAPI(httpMethod,url,params,1);

Error in Twitter_Stream (line 44)
tw.filterStatuses('track',uk_trends{1}); % Streaming API call

Has anyone resolved this issue?

Thanks!

hi can someone help me?

my credentials (line298) are not valid. I have tried to create a new app but this did not work out well

It worked fine for me at the moment. Thank you!

Has anyone had any luck sending an image (.jpeg) to twitter with the twitty object?

I've tried to add methods for updateStatusWithMedia() for the Twitter API, but haven't had any luck so far.

Thanks!

Trying tw = twitty(credentials), but receive error, "The supplied credentials are not valid."
Have created twitter developer app successfully
MATLAB 8.1.0.604 (R2013a) on Win7 x64
Any suggestions?

Hello Chetathorn,

I am sorry that my suggestions were of no help. I now believe my previous advice is entirely non-sense. I do not know how this code works fundamentally, but recognize the main difficulty generally experienced is a failure to authenticate with Twitter using OAuth protocols. Unfortunately, MATLAB does not have OAuth built-in.

Twitty makes a gallant effort to interface with Twitter and when it works it is awesome. However, I have found it to be rather buggy and temperamental; sometimes it works and sometimes it doesn't. Finally, I reached sufficient frustration that I developed my own solution. If you are still having trouble I would encourage you to try it for yourself, because I uploaded it to the FX.

http://www.mathworks.com/matlabcentral/fileexchange/53691

Goodluck,
Kyle

Hello.
Please help on my error "The supplied credentials are not valid." I also tried method of kyle "create a credentials struct "
Still get error
Is there a solution to these errors?
I have checked my credentials on the twitter site via OAuth so I am fairly sure they are in fact valid

Hello Srikrishnan,

TLDR. Try using a struct to save the credentials.

I have found that the tw.saveCredentials() method that prompts the user for 4 keys in a pop-up window does not work for me. I get the same error (line 1974) that many others have.

However, if I create a credentials struct and create the 4 fields for each key from the command line with each key as a char, then I have success. Please try this approach. If you type 'help twitty' this is the first option to obtain credentials with twitty.

i'm getting the same errors as Sandor Toth and sushma sharma.
Is there a solution to these errors?

i'm getting the same errors as Sandor Toth and sushma sharma.
Is there a solution to these errors?

Hello,

I have a comment and a question.

First, I've noticed a number of comments about authentication errors. I too had this problem. The solution for me was to recreate the AccessToken on the twitter-dev website, after I had changed the permissions to Read and Write. The token must be regenerated to reflect the permission change.

Second, does anyone know how to send emoji with twitty?

Thanks,
Kyle

Having the same problem: "Error using twitty (line 298)
The supplied credentials are not valid."
My credentials work using OAuth...
Any help would be appreciated!
S

I get the same error message as Mircea:
Error using twitty/callTwitterAPI (line 1974)
Java exception occurred:
java.io.IOException: Server returned HTTP response code: 401 for URL:
https://api.twitter.com/1.1/statuses/update.json
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1459)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:234)
Error in twitty/updateStatus (line 841)
S = twtr.callTwitterAPI(httpMethod,url,params,1);

Is there any solution?

I got a msg of error:

??? Error using ==> twitty
Error: File: twitty.m Line: 448 Column: 33
Unexpected MATLAB operator.

I am using Matlab 7.8.
Can you help me? Thx

unfortunally i am facing the same problems as below:

Error using twitty (line 298)
The supplied credentials are not valid.

i made pretty sure, that i entered everything correctly.

Would appreciate to get some feedback, because i want to use this awesom function!

p.s. Using Matlab 2013a x64 with win 8

Hello.. I'm facing this error with tw.search('matlab'):

amazon = tw.search('matlab');
Error using twitty/callTwitterAPI (line 1975)
Java exception occurred:
java.io.IOException: Server returned HTTP response code: 401 for URL: https://api.twitter.com/1.1/search/tweets.json?q=matlab

at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)

at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)

Error in twitty/search (line 1065)
S = twtr.callTwitterAPI(httpMethod,url,params,1);

Any ideas How i can solve this?

Thanks

I am also facing the same problem!
"Error using twitty (line 298)
The supplied credentials are not valid."

I am having the same problem as Sean Mc was having with the
"Error using twitty (line 298)
The supplied credentials are not valid."
I was wondering what you worked out to fix it. I have checked my credentials on the twitter site via OAuth so I am fairly sure they are in fact valid but I was wondering if you had any other ideas as to where the problem might lie.

This looks great!! I get the same error as SosoMed. I have not been able to make it work I am new to all this, sorry. Any advise??
Thanks in advance

Trying "S = tw.search('matlab'); ",
But receive error:
">> try1
Error using twitty/callTwitterAPI (line 1974)
Java exception occurred:
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path
building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to
find valid certification path to requested target

at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Unknown Source)

at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(Unknown Source)

at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Unknown Source)

at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Unknown Source)

at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverCertificate(Unknown Source)

at com.sun.net.ssl.internal.ssl.ClientHandshaker.processMessage(Unknown Source)

at com.sun.net.ssl.internal.ssl.Handshaker.processLoop(Unknown Source)

at com.sun.net.ssl.internal.ssl.Handshaker.process_record(Unknown Source)

at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(Unknown Source)

at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)

at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)

at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)

at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)

at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown
Source)

at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)

at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)

Caused by: sun.security.validator.ValidatorException: PKIX path building failed:
sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid
certification path to requested target

at sun.security.validator.PKIXValidator.doBuild(Unknown Source)

at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)

at sun.security.validator.Validator.validate(Unknown Source)

at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.validate(Unknown Source)

at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown
Source)

at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown
Source)

... 12 more

Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find
valid certification path to requested target

at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)

at java.security.cert.CertPathBuilder.build(Unknown Source)

... 18 more

Error in twitty/accountVerifyCredentials (line 1469)
S = twtr.callTwitterAPI(httpMethod,url,params,1);

Error in twitty/saveCredentials (line 398)
S = twtr.accountVerifyCredentials;

Error in try1 (line 3)
tw.saveCredentials();

>> try2
Error using twitty/callTwitterAPI (line 1974)
Java exception occurred:
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX
path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable
to find valid certification path to requested target

at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Unknown Source)

at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(Unknown Source)

at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Unknown Source)

at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Unknown Source)

at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverCertificate(Unknown Source)

at com.sun.net.ssl.internal.ssl.ClientHandshaker.processMessage(Unknown Source)

at com.sun.net.ssl.internal.ssl.Handshaker.processLoop(Unknown Source)

at com.sun.net.ssl.internal.ssl.Handshaker.process_record(Unknown Source)

at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(Unknown Source)

at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(Unknown
Source)

at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)

at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)

at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)

at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown
Source)

at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)

at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)

Caused by: sun.security.validator.ValidatorException: PKIX path building failed:
sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid
certification path to requested target

at sun.security.validator.PKIXValidator.doBuild(Unknown Source)

at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)

at sun.security.validator.Validator.validate(Unknown Source)

at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.validate(Unknown Source)

at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown
Source)

at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown
Source)

... 12 more

Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find
valid certification path to requested target

at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)

at java.security.cert.CertPathBuilder.build(Unknown Source)

... 18 more

Error in twitty/search (line 1063)
S = twtr.callTwitterAPI(httpMethod,url,params,1);

Error in try2 (line 1)
S = tw.search('matlab');

Good stuff! And thanks for the debugging help!

Trying tw = twitty(credentials), but receive error, "The supplied credentials are not valid."
Have created twitter developer app successfully (tried twice).
MATLAB 8.1.0.604 (R2013a) on Win7 x64
Any suggestions?

Can anyone explain the procedure to get & include the "VeriSign Class 3 Public Primary Certification Authority - G5" certificate?

From the 10th of Dec, api.twitter.com is using a new SSL certificate: https://dev.twitter.com/blog/rest-api-ssl-certificate-updates

Now, to establish a secure connection to Twitter, MATLAB must have in its keystore of trusted authorities the "VeriSign Class 3 Public Primary Certification Authority - G5" certificate.

Works again in R2013b. Reason is the updated JVM (1.6 => 1.7) handling the TLS correctly.

I'm using http://www.mathworks.com/matlabcentral/fileexchange/33381-jsonlab-a-toolbox-to-encodedecode-json-files-in-matlaboctave as JSON parser, works flawlessly so far.

This package has worked fantastic for me for automatic data updates. Thanks!

Recently I have had the same problem as Jothi below with the ERROR:

??? Java exception occurred:
java.io.IOException: Server returned HTTP response code: 400 for URL:
http://api.twitter.com/1/account/verify_credentials.json

Any thoughts?

Thanks in advance,
Craig

Code was just what I needed, thanks

"An output function can a usual m-file, e.g., the "tweetingSummary.m" file provided with the twitty"

Could you make tweetingSummary.m available to download?

it is not accepting query with or / and
for ex 'exascale or petascale'

Although twitter api supports this

Can some one help me on this?

Sir,

i have obtain twitter credential according to you instruction. ie.,

tw.saveCredentials()

but i have following error. how to set the credentials. how to search and download tweets using matlab.

??? Java exception occurred:
java.io.IOException: Server returned HTTP response code: 400 for URL:
http://api.twitter.com/1/account/verify_credentials.json

at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)

Error in ==> twitty>twitty.callTwitterAPI at 2018
inStream = BufferedReader( InputStreamReader( httpConn.getInputStream ) );

Error in ==> twitty>twitty.accountVerifyCredentials at 1410
S = twtr.callTwitterAPI(httpMethod,url,params,1);

Error in ==> twitty>twitty.saveCredentials at 233
S = twtr.accountVerifyCredentials;

kindly help me sir.

thanks in advance.

@Rucci

I added the following at line 1411:

if isstruct(S{1}), S = S{1}; end

Seems to fix the problem. Note: I have json_parser.m on my path.

Hello,
I've complete to obtain twitter credential according to your instruction.
I used my twitter credential to create the credential structure as the follows

credentials.ConsumerKey = 'XXXXXXXXXX';
credentials.ConsumerSecret = 'XXXXXXXXXXXXX';
credentials.AccessToken = 'XXXXXXXXXXXX';
credentials.AccessTokenSecret = 'XXXXXXXXXXXX';

Then I create the twitty object using the command: tw = twitty(credentials)
I got the error message as the follows

??? Error using ==> strfind
Inputs must be character arrays.

Error in ==> twitty>twitty.twitty at 149
if strfind(lower(S{1}),'error'), error('The supplied credentials are not
valid.'); end

I think the code had been modified since Apr 2012 for this problem. I'm not sure whether I did something wrong.

Would you please advise?

I am trying to use the function friendshipsCreate and it gives me the following message...

>> S = tw.friendshipsCreate('pepe','matlab','follow','true')

??? Java exception occurred:
ice.net.URLNotFoundException: Document not found on server
at ice.net.HttpURLConnection.getInputStream(OEAB)

Error in ==> twitty>twitty.callTwitterAPI at 2018
inStream = BufferedReader( InputStreamReader(
httpConn.getInputStream ) );

Error in ==> twitty>twitty.friendshipsCreate at 1128
S =
twtr.callTwitterAPI(httpMethod,url,params,1);

@Yu Ang Tan: thanks for the comment. I've fixed the strfind(lower(S),'error') issue.

@Justin: did it resolve your problem?

@Michael: I replied to your email, but my reply couldn't be delivered ("no such user" error). Do you have an alternative email address?

Justin: change line 136:
if strfind(lower(S),'error'))...
to
if strfind(lower(S{1}),'error'))...

Michael: create a structure
credentials.ConsumerKey='SH1asd325tgdsasOVedYsA';
credentials.ConsumerSecret = 'on325gtgafafdsfegawe4365ghgSDF';
credentials.AccessToken = '123554-PZjoiso98n3ocrlWFOJ39rjlsjfwzOdq';
credentials.AccessTokenSecret = 'W6r324fjlajaMMLasffSMMk';
tw = twitty(credentials);

You'll need to replace those strings from your developer page. The strings above are just garbage values.

Looks great. However, can you provide an example file format of how the credentials files should look like.

Sorry if this is a novice question. See potential but having difficult time using on 2007b.

thanks

Not sure if I'm just doing something wrong but I can't seem to get this going. Whenever you try to set or save the credentials it returns an error

Conversion to logical from cell is not possible.

Disregard... I didn't read the twitter api suggestions. Great Code... Under promises, Over Delivers!!