Changing the status of a Production BOM to Certified (using web services)

Hello,

I have been getting problems trying to change the status of a Prod BOM using the Navision webservice (Page webservice with object id: 99000786)

For example,

I invoke the Read function in the web-service with the parameter (No = 350911-20).

The object that the Read function returns is then modified so the Status value is set to to "Certified".

I then call the Update function with the parameter being the ProdBOM, and I get the error:

"Status must not be Certified in Production BOM Header No.='350911-20'."

The status was originally Under Development.

Is there some limitations on changing the status using web services?

I can change the"Status" value of 350911-20 in Navision manually and it works fine.