This entry point is executed if the EXECFL parameter 'execute on double click' is set to 2.
The screen field which contain the BOM are available and loaded.
The available variable are as follows:
CODACT : action code, loaded at 'E' in the double click context.
MESSAGE: If there is an anomaly, this variable should be loaded with a message.
CODRET : initialized at 1. If there is an error, this error code should be loaded with a value different than 1.