Hi Venu
first check your ecc del, is it able to change, If yes then its not distributed in EWM.
Then if its not changeable then its in EWM and check SLG1 in EWM and queues in EWM.
SLG1 will give complete idea about the issue.
if all above is good then goto /scwm/prdi and click on IDN and check its green or red.,
If red then provide the log we will resolve ur issue.
Regards
Suraj