Diagnosis
The character string you are searching for, &V1&, contains theplaceholder * but not as the first character in the character string.

System Response
The system only finds positions where the first characters areexactly character string '&V1&'.
If there are additional characters before '&V1&', the system doesnot find these.

Procedure
Add an additional placeholder * at the beginning of the character stringyou are searching for.