Diagnosis
You tried to create a coding mask that contains at least two specialcharacters (&V1&) next to each other.
Special characters are intended to optically separate significantsegments of the position ID. Since one special character is enough forthis purpose, two or more special characters are not allowed next toeach other.

System Response
The coding mask is not created.

Procedure
Do not create coding masks that have two or more special characters ina row.