I have build the report using service request object with custom subject area but getting error.

Summary:

I have build the report using service request object with custom subject area and trying to map the reference number to SR number (custom object custom field) but getting error.

Content (please ensure you mask any confidential information):

We have a custom, object called 'Datas estados Pedidos de Suporte' , this has a 1:M relationship with Service request object. This custom object has SRNumber_c field. we have groovy code , object function called RegisterStatusAndTeamsDates , which is called from Before update and Before insert triggers. This funciton poulates the value of SRNumber_c with value of Service Request SR_Number field.