Diagnosis
The planning material &V1& (plant &V2&)belonging to material &V4& which you are processing is blocked by userV3. the system has attempted several times without success to blockthis material.

System Response

So as not to slow your work, the system stops its attempts at blockingand does not carry out an assignment check.

Procedure
Note that the transaction you are processing is not confirmed. Youshould therefore carry out another assignment check(availability check).