EV3 Error and VM Program Instruction Break
UPDATE: It turns out there was a compiler issue in the EV3 desktop programming software. LEGO has released a fix in v1.2.2 of both the Home and Education versions. Upgrading your software will fix this problem.

Read more about the problem and the fix in this pdf from the Seshan Brothers.



ORIGINAL ANSWER:

Some suggestions from the LEGO MINDSTORMS EV3 Facebook group:


Too many named loops in your code
Too many blocks in a loop
Try to avoid using too many loop interrupts
A problem with the copy/paste - delete the pasted portion of the program and make it from scratch