How To Fix GM012 - La clase de actividad & está bloqueada

SAP Error Message - Details

• Message type: E = Error

• Message class: GM - Combination manager

• Message number: 012

• Message text: La clase de actividad & está bloqueada

¿Qué causa este problema?

Activity type &V1& that you want to plan is blocked for planning. This
block was set in the master record of this activity type within the
period addressed.

¿Cómo arreglar este error?

Do not plan activity type &V1& at all, or
shorten the planning period such that activity type &V1& is open in the
new period, or
cancel the block.

Extracto de mensaje de error del sistema SAP. Copyright SAP SE.