Ok, so im trying to build custom code for a project in Quality Center using the script editor. I added the following field manually to a project under Project Customization >> Project entities >> Run >> System fields >> Run Name
RN_RUN_NAME = Field Name
So now what im trying to do, is to make this field required and not optional when users execute a test in a test lab. This field is a drop-down list in which a tester will select a branch of where they are testing from.
Are you sure you added the field to the System Fields list? In ALM v11 the System Field list can't be added to. If you somehow managed to add the field to the System Fields list, try removing it from there and adding it to the User Fields list and then see if the Required checkbox is available.