I don't think it is possible to extend Occ Note field length.
If your use case permits, there are other means to capture data at occurrence level.
I have not come across a way to extend the field length of occ notes beyond 160 chars.
you could try setting up a custom form with custom attribute which allows text more than 160 chars. Then compound that form attribute to occurrence.
Thanks for reply again.
"you could try setting up a custom form with custom attribute which allows text more than 160 chars.Then compound that form attribute to occurrence"
in this way,same item in different BOM will display same attribute value
I want to display different values
I understand. We had the same issue.
In you case, if it is okay to share, can you please describe the use case for occurrence specific information?
In my use case：
I save the schematic（cadence16.6） to TC（188.8.131.52） through the cadence integration tool（TcEDA2.0.1）.The EDA BOM has many same item，like this
I will merge the same item through the program,but in the WH column,the merged value will exceed 160 characters