From: Sally Thompson on
I'm having an identical problem: when opening a saved figure I return an array of logical variables. The figure was saved through the GUI, on the same machine and same matlab version (2010a) for Mac.

Using the guide <filename> prompt I retrieve:

Error using ==> load
Unable to read MAT-file
Try LOAD-ASCII to read as text

Followed by a reference to errors in the guide file.

Again -- any suggestions as to the cause of this error, fixes, or ways to avoided it in the future would be fabulous -- losing saved figures represents a large waste of time!