C6Caccel - how to get extra error information, iUniversal returns -7 - what is this error ?

Dear TI

I am trying to extend c6accel to call an example function.

I am getting as far as calling the iUniversal Process call on the ARM but it is returning status -7 ; 

I found the xdm.h header file but it goes as far as -5  -

How can I get some more information regarding  the eror ?

All the best