hi i'm really puzzled by this issue i think it's somethign very simple but i cannot figure it out :(

i get this error wnen i run this code

acr = cust.AddCustomer( act.id, wbsite, act.name, (act.website==null?'':act.website), ld.description__c, (act.ACN_ABN__c==null?'':act.ACN_ABN__c), (streetline1==null?'':streetline1),//act.BillingStreet, (streetline2==null?'':streetline2),//billingstreet2 (ld.Suburb__c==null?'':ld.Suburb__c), (act.Billingstate==null?'':act.Billingstate), (ld.post_code__c==null?'':ld.post_code__c),//act.BillingPostalCode, act.phone, (act.fax==null?'':act.fax), (con.FirstName==null?'':con.FirstName), (con.LastName==null?'':con.LastName), con.Email, con.Phone);

however if i comment any of those values out

it works just fine

here is example

acr1 = cust1.AddCustomer( act.id, wbsite, act.name, (act.website==null?'':act.website), ld.description__c, (act.ACN_ABN__c==null?'':act.ACN_ABN__c), (streetline1==null?'':streetline1),//act.BillingStreet, (streetline2==null?'':streetline2),//billingstreet2 (ld.Suburb__c==null?'':ld.Suburb__c), (act.Billingstate==null?'':act.Billingstate), (ld.post_code__c==null?'':ld.post_code__c),//act.BillingPostalCode, act.phone, (act.fax==null?'':act.fax), con.FirstName, con.LastName, con.Email); // con.Phone);