Tom,
this is a demo included with MCSDK it comes inside mcsdk_2_01_02_05/demos folder.
One thing I remember when this problem appears is that I was working with 8 processor messages and
I decided to set core 0 as the one with the only task of receive strings and distribute them to others cores and get the response of the cores. From here I have started to see the message of A_invalidFree from time to time . I have searched some misplaced declaration for core 0 but all are defined for cores 1 to 7 as it must be. I don´t know if IPC allows to work with messages for cores 1 to 7 only.
Meanwhile I am trying to insert breakpoints and I will try the new version of sysbios as you advise me .
Regards
Julian