Trigger wont validate

Hi I am trying to get a trigger working with an update statement, I keep getting "Field "From Relationship" must have a value (line #20)" error and have no idea why? All the correct values are being returned?

var fromAcc = {!associationFromAccount};
var toAcc = {!associationToAccount};

var assocRecId = rbv_api.selectQuery("select id from association where associationToAccount = ? and associationFromAccount = ?", 1, fromAcc, toAcc);

var currentRecord = rbv_api.selectQuery("select id, fromDescription, toDescription, associationFromAccount, fromRelationship, associationToAccount, toRelationship from association where id = ?", 1, {!id});

var arr = new Array();
//arr['id'] = currentRecord[0][0];
arr['toDescription'] = currentRecord[0][1];
arr['fromDescription'] = currentRecord[0][2];
arr['associationToAccount'] = currentRecord[0][3];
arr['toRelationship'] = currentRecord[0][4];
arr['associationFromAccount'] = currentRecord[0][5];
arr['fromRelationship'] = currentRecord[0][6];

rbv_api.printArr(assocRecId);
rbv_api.updateRecord("association", assocRecId[0][0], arr);


I also have a trigger to delete in the same fashion but cant get the formula to validate:

var fromAcc = {!associationFromAccount};
var toAcc = {!associationToAccount};
//rbv_api.println(fromAcc + "|" + toAcc);
var assocRecId = rbv_api.selectQuery("select id from association where associationToAccount = ? and associationFromAccount = ?", 1, fromAcc, toAcc);
//rbv_api.printArr(assocRecId);
rbv_api.println(assocRecId[0][0]);
rbv_api.deleteRecord('association', assocRecId[0][0]);


If I use:

rbv_api.deleteRecord('association', assocRecId); - The formula validates but doesnt work.

If I use:

rbv_api.deleteRecord('association', assocRecId[0][0]); - The formula doesnt validate but works...

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