Regression learner app, unrecognized function at startup

I'm using Matlab R2022a and wanted to start the Regression Learner app for the first time. It comes back with errors:

Unrecognized function or variable 'isTextStrict'.

Error in erase (line 33)

if ~isTextStrict(str)

Error in mlearnapp.internal.ui.savesession.SessionSaveLoadController (line 108)

this.MATLABRelease = erase(versionInfo.Release, {'(',')'});

Error in mlearnapp.internal.model.ModelFactory/createSessionSaveLoadController (line 368)

sessionSaveLoadController = mlearnapp.internal.ui.savesession.SessionSaveLoadController(session, dialogFactory, problemDependentToolstripFactory, fileUtilities, appConfiguration);

Error in mlearnapp.internal.model.Session (line 168)

this.SessionSaveLoadController = this.ModelFactory.createSessionSaveLoadController(this, problemDependentToolstripFactory);

Error in mlearnapp.internal.model.SessionFactory/createSession (line 18)

session = mlearnapp.internal.model.Session(sessionFactory, modelFactory, metricFactory, validationPartitionFactory, modelList, poolContext, problemDependentToolstripFactory, mainThreadBusyTracker);

Error in regressionLearner (line 98)

session = sessionFactory.createSession(metricFactory, validationPartitionFactory, problemDependentToolstripFactory, mainThreadBusyTracker);

This seems bad for something that was never used? Any suggestions?

Rogier

Answer 1

[Rogier Mars]

Ah, restoredefaultpath helps.

[Ri go]

it didn't work for me

[Walter Roberson]

Error in erase (line 33)

if ~isTextStrict(str)

The function erase, toolbox/matlab/strfun/erase.m does not have 33 lines, so some other erase.m is getting invoked.

which -all erase

to check which erase is getting invoked.

[Ri go]

it replied with this

>> which -all erase

C:\Program Files\MATLAB\R2024a\toolbox\matlab\strfun\erase.m

erase is a built-in method % string method

C:\Program Files\MATLAB\R2024a\toolbox\matlab\bigdata\@tall\erase.m % tall method

C:\Program Files\MATLAB\R2024a\toolbox\parallel\array\distributed\@codistributed\erase.m % codistributed method

>>

[Walter Roberson]

@Ri go

Could you confirm that the error message you got is

Unrecognized function or variable 'isTextStrict'.

Error in erase (line 33)

if ~isTextStrict(str)

?

Because C:\Program Files\MATLAB\R2024a\toolbox\matlab\strfun\erase.m only has 21 lines of code.

It does check if ~isTextStrict(str) in the code, but that check is at line 8 of the code.

isTextStrict is defined in R2024a, at toolbox/matlab/strfun/private/isTextStrict.m

which -all isTextStrict

[Ri go]

the main error that gives me is

Error using erase

Too many input arguments.

Error in mlearnapp.internal.ui.savesession.SessionSaveLoadController (line 108)

this.MATLABRelease = erase(versionInfo.Release, {'(',')'});

Error in mlearnapp.internal.model.ModelFactory/createSessionSaveLoadController (line 431)

sessionSaveLoadController = mlearnapp.internal.ui.savesession.SessionSaveLoadController(session, dialogFactory, problemDependentToolstripFactory, fileUtilities, appConfiguration);

Error in mlearnapp.internal.model.Session (line 168)

this.SessionSaveLoadController = this.ModelFactory.createSessionSaveLoadController(this, problemDependentToolstripFactory);

Error in mlearnapp.internal.model.SessionFactory/createSession (line 18)

session = mlearnapp.internal.model.Session(sessionFactory, modelFactory, metricFactory, validationPartitionFactory, modelList, poolContext, problemDependentToolstripFactory, mainThreadBusyTracker);

Error in classificationLearner (line 100)

session = sessionFactory.createSession(metricFactory, validationPartitionFactory, problemDependentToolstripFactory, mainThreadBusyTracker);

also for the strict check it gives me this

>> which -all isTextStrict

C:\Program Files\MATLAB\R2024a\toolbox\matlab\strfun\private\isTextStrict.m % Private to strfun

>>