Creating UDV Axis, error 6280 in Interactive Test Panel

Hello,

I'm trying to deploy an Axis in NI Softmotion. When I open the interactive test panel, I get the fault 6280 : "There was a problem while deploying the User-Defined Variables for an Axis."

I'm using the C-series Module 9503 and a cRIO 9022 to drive a stepper motor. 

Does anyone have an idea of what could cause the problem or has already encounter the problem ?

Thanks,

Margaux