# ID 20780

Tool management was not able to prepare tool change.
Description | The order to prepare a tool change (T word) was acknowledged incorrectly by the external tool management.
Response | Class | 2 | Abort NC program processing.
Solution | Class | 6 | Check and modify external tool management. If the parameters 1 and 2 are identical, the tool management has acknowledged negative. If the parameters 1 and 2 are not identical, the tool management has acknowledged a tool, which was not instructed.
Parameter | %1: | Current value [-]
Number of the received tool
%2: | Expected value [-]
Number of the requested tool
Error type | 3, Error in the communication.