Field help (URNLOK) 

Specifies whether it is a blocking reason or not.

A blocking reason is used to block the missions or operations that are totally unrealistic and that require specific actions before they can be launched. This prevents them from being submitted again to another resource for nothing. For instance, concerning a transfer mission, if the resource does not physically find the SO in the original location, it will reject this operation with a blocking reason. As a consequence, this operation will be blocked and no longer submitted to another resource.

Any blocked mission can be unlocked following a manual action in the mission function.

Any blocked mission can be unlocked following a manual action in the mission function or in the operation unlocking function.

SEEWARNING This blocking indicator can only be accessed for the "manual" mission type reasons (reasons that have no associated internal code)