Calc 4.3.x crashes on save shared file

I use shared *.ods spreadsheet in my LAN, file is located on some network drive. I use macro to refresh document - refreshing occur of course when file is saved.

Macro is just this

oDoc = ThisComponent

Crash happens randomly when saving/refreshing file, sometimes on second refresh, sometimes on fourth, theres no pattern.

Network drive is a mapped volume (non-system partition) of desktop PC running under windows7 (its quite old unit works as home media server), connections are made from two laptops (win7 and win8).

During searching solutions with .store command I record macro with “ctrl+s” command

dispatcher.executeDispatch(document, ".uno:Save", "", 0, Array())

This way works perfectly - i noticed just one crash in 200 savings.

Please edit the question to indicate more detail about the nature of the network drive i.e., how it is shared, mounted, accessed, under which operating system, etc. All these details influence potential problems.