Error: Source contains no datarows

@Florent_Salendres Hi yes, im using something like that

cdr.Select(“Client=”+"‘“+serverName+”’ ").CopyToDataTable

cdr.Select(“Client =”+“'”+clientName+“'”+" and Agent = ‘Windows File’ and Type = ‘FULL’ and [Type] = 'Weekly '").CopyToDataTable

is the line wrong?