Couldn't modify the tag's scope

There is a problem changing the scope of a tag. The message may indicate one of these conditions.

This tag can only exist at controller scope

Motion Group, AXIS_CONSUMED, AXIS_VIRTUAL, AXIS_SERVO, AXIS_SERVO_DRIVE, and Message tags can only exist at the controller scope (that is, not at program scope). Produced and Consumed tags can only exist at the controller scope as well.

The tag references one or more tags at the program scope

If this tag references program-scoped tags it cannot be moved to the controller scope. This applies to alias tags as well as Message and Alarm tags, which can reference other tags.

Access denied

Check with the security administrator to be sure you have access to modify tags.

Phase parameter tags cannot be moved to controller scope

The tag is an Input or Output parameter for an equipment phase. Phase-scoped tags can only be moved to controller scope if their usage is <normal>.

A referenced tag is a controller-scoped standard or safety tag and it collides with a controller-scoped safety or standard tag, or a program-scoped tag of the same name exists. Or, a referenced tag is a program-scoped and existing program logic is referring to a controller-scoped tag by the same name.