Error massage "Caught "std::exception"

I always get the following message:

"Caught "std::exception" Exception message is: Message Catalog MATLAB:FileIO was not loaded from the file. Please check file location, format or contents".

Unfortunately i'm not really used to work with matlab because its just for a student project.

[Walter Roberson]

Are you getting that message for even simple commands?

Or are you running code in which you do an fopen() in a loop, and at some point eventually your code gives you that error? If that is the case then you might be forgetting to fclose() the files.

[Jan]

What does "I always get" exactly mean? When is the message displayed?

[Christian Kipf]

Thanks for your comments i solved it with fclosed().