Change Request no @ CL_USMDZ7_RS_ACCCCDET

Hello,

I have written post exit at CL_USMDZ7_RS_ACCCCDET Method CHECK_ENTITY_P.

Here I am trying to read change request no via CL_usmd_app_context=>get_context( ). but that is blank .I tried reading URL parameter that is also blank. Any other way to get change request no ?

Regards,

Varun