excel - Macro stopping at print PDF code -

we use single machine run our vba macros.
last week changed machine - virtual "server" running windows 7: i'll use term server quite loosely more virtualised-pc.

everything running smoothly apart 1 line of code:

excel.activesheet.exportasfixedformat _     type:=xltypepdf, _     filename:=filepath_pdf & filename_pdf, _     quality:=xlqualitystandard, _     includedocproperties:=true, _     ignoreprintareas:=false, _     from:=1, _     to:=2, _     openafterpublish:=false 

unfortunately error message reported when bugs not descriptive , if go debug mode , hit f8 runs line ok!

it running under credentials of network login not network login.
login same 1 used our previous non-virtual excel box.

is there software need double-check installed on new box?
there alternative approach take move contents of file pdf file?

[note third parties: not answer problem]

example of error handling:

public sub boo(byval calendar variant) on error goto errhandler    dim sprocedurename string: sprocedurename = "boo"    'code here  exitprocedure:   on error resume next   'final termination here   exit sub  errhandler:   debug.print "error """ & err.description & """ in " & sprocedurename   goto exitprocedure:   resume 'used debugging, never hit in run time  end sub