vb.net 2010 - Arithmetic Operations Resulted in an Overflow -


i have vb.net application copies text file windows ce device via active sync. however, when doing throws exception stating arithmetic operations resulted in overflow on specific workstation running windows 7 64 bit on other machine runs seamlessly. can me resolve exception?

here code:

if m_rapi.connected = true      dim dirmasterfile string = application.startuppath & "\masterfile.txt"       try          if file.exists(dirmasterfile)              m_rapi.copyfiletodevice(dirmasterfile, "\storage card\testfolder\masterfile.txt", true)              mmas = "item masterfile uploaded"          else              mmas = "no item masterfile found"          end if      catch ex exception          msgbox(ex.tostring, vbcritical + vbokonly, "error")          exit sub      end try  end if


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