Sum Related Records into Parent Record

Hello,

I have the below code and am trying to sum the Net Profit into the parent record, however i get this error...

Info

{"code":"INVALID_DATA","details":{},"message":"the relation name given seems to be invalid","status":"error"}

Failed to execute function

Argument type mismatch - Found 'TEXT' but Expected '[BIGINT]' for the function 'get' Line Number:8

Code:

resp = zoho.crm.getRelatedRecords("Client_Reporting","Locality_Review_777_Data",Id.toLong());

info resp;

total = 0.0;

for each rec in resp

{

total = total + ifnull(rec.get("Net_Profit1"),"0.0").toDecimal();

}

info total;

updateResp = zoho.crm.updateRecord("Locality_Review_777_Data",Id.toLong(),{"Net_Profit":total});

info updateResp;

Can you pelase help me?