hi

"nexus" is read only, thus "nexus = 500;" does not work.

put into 'preferences'->'command line options' "-nx 200" or "-nx 500" (but going over 300 is not recommended), and use Test Run (only this takes into account command line options).

or make a dummy .wmb where you can set nexus, and compile your project from WED.

it solved my similar problems.