Too many Input arguments error.

I get too many input arguments error whenever i try to perform PCA or use regression learner. This started ever since i downloaded van der maatens DR toolbox. Please Assist.

[Jan]

Please post the complete error message and the corresponding part of the code. The rought paraphrasation of the message is not enough to understand, what's going on.

[Walter Roberson]

restoredefaultpath; rehash toolboxcache

and then try again.

If that works then there must be a function in the toolbox that is interfering with normal MATLAB use.