SAP Note 15263 - Scheduling basis in the work center. Transaction CR02

Symptom:

The scheduling capacity on the scheduling screen cannot be deleted.
The error message 064: "The selected work center capacity is the basis for scheduling" is displayed.

Cause and prerequisites

Handling or setting problems.

Solution
Provided the time constraint (table T777Z) 'Work center capacity for scheduling' allows it, delete as follows:

On the scheduling screen via the menu options :
'Edit -> Delete'

If you still cannot delete, this is due to the fact that table T777Z is not set correctly. This table determines the time constraints between different objects such as 'Work center' - 'Capacity as basis for scheduling'. The table is to be maintained via transaction SM31. The entry in question should be as follows:

Obj.type Infoty. Subty. Time constraint -------------------------------------------
A 3005 2

Note.
-----

1)
When maintaining this table, we recommend to change the following
entries as described below:

Obj.type Infoty. Subty. Time constraint -------------------------------------------
A 3006 * 3
A 3007 2

2) Setting this table is no longer required as of Release 3.0.