The material does not exist in plant &1

What causes this issue?

The system could not transfer the material memo (parameter
MATERIALLONGTEXT) because the field TEXT_NAME contains a plant to which
the material memo is not assigned.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Check whether the field TEXT_NAME in the parameter MATERIALLONGTEXT
contains the correct value. If it does, check whether the material has
been assigned to the plant specified in field
MATERIALLONGTEXT-TEXT_NAME.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.