&CAUSE&
You want to specify a reference to a primary characteristic for aparameter characteristic. However, the characteristic number you entereddoes not exist in the inspection plan.

Procedure
Enter an existing characteristic number. Note that the referencecharacteristic must be a primary characteristic, i.e. an inspectioncharacteristic with parameter characteristics.
Note
A master inspection characteristic only counts as a primarycharacteristic in an inspection plan if an inspection method is assignedto it, which in turn has parameter characteristics assigned to it. Evenif these parameter characteristics are deleted in the inspection plan,the master inspection characteristic still remains a primarycharacteristic.