Matlab not recognizing 'filename' command

I used Matlab's built in script creator for importing data from a csv file, and when you do that, it automatically defines the variable 'filename' to be the name of the file you're importing. When I try to call on it later to export the data, it keeps giving me the error:

Undefined function or variable 'filename'.

Error in test (line 269) outputfile=regexprep(filename,'.csv','1out.xlsx');

Any ideas on why it's claiming that the variable it defined isn't defined?

Answer 1

[Star Strider]

Check your ‘Workspace’ window to see if ‘filename’ exists in your workspace.

Another option is:

whos('filename')