approval misses object link in notification

Hi together,

approval system of NAV 2009 R2 keeps some points open to me. Sending an purchase approval request misses the client access string in the html document. After checking CU 440 it points out, that text variable “text004” with caption “To view your documents for approval, please use the following link:” is set nowhere in the unit.

Any ideas on how this could bring to work properly?