Mod 6v2 : array too small

I have installed mod 6v2,

Execution of examples shows there is a problem :

Scan_all_err

results in :

******************* Test of last lines: *******************

**************** Test of E>: **************** FILE: ./commands/./debug_function.log pair1___223E> Array too small. Increase MPAIRS recover____E> ERROR_STATUS >= STOP_ON_ERROR: 1 1

FILE: ./commands/./define_symmetry.log pair2___223E> Array too small. Increase MPAIRS recover____E> ERROR_STATUS >= STOP_ON_ERROR: 1 1

And finally close my terminal....

Any idea about what should be done ?

Thank you Juliette Martin