Operation Not Activated (Invalid Mode/Block Executing)

What does 255 mean?

Operation cannot be activated because either an invalid mode is specified or a block execution is currently in progress. The system is either in an incompatible state or busy.

• Invalid mode specified for the requested operation.
• A block execution is currently in progress, preventing activation of a new operation.

1. 1

   Check the current operating mode for compatibility.

2. 2

   Verify whether a block is currently being executed; wait for it to stop before activating a new operation.