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This API call can be used to test whether a change request exists.

Usage:

set ok=$$crexist^%vcapi(userid,chref,.exists,.err)

Inputs:

userid	Deltanji user ID (derived from host operating system if null)
chref	Change request code

Outputs:

$$crexist	1 = Operation succeeded 0 = Operation failed
exists	1 = Change request exists 0 = Change request does not exist
err	Error message if operation failed

Error messages:

vc1016

Invalid change request number

A null change request code is not permitted