FSUIPC problem while flying, lost connection

[tomcontr]

Hi,

I having some problems with FSUIPC and some of my users.

The problem that they have is that when they are Flying with The software I developed, some times or most of the times the Lost conection with FSUIPC. This is one of the example code:

FSUIPC_Read &h56C , 4, VarPtr(Result), (dwResult)
If FSUIPC_Process(dwResult) then
   do this
else
   show error "LOST CONNECTION WITH FSUIPC"
end if

This is so wierd, because this error should appear only when the FS crash, o the user close it. But it happend when they are fliying.

Now I must say that this problem occurs only with 2 people, so it´s not a big problem, but want to fix it any way.

So if some one happend to now something about this problem, o had have the same problem with other program that uses FSUIPC, I will apreciate very much if he could give me a hand.

Best Regards

Thomas.

[Pete Dowson]

The problem that they have is that when they are Flying with The software I developed, some times or most of the times the Lost conection with FSUIPC. This is one of the example code:

FSUIPC_Read &h56C , 4, VarPtr(Result), (dwResult)
If FSUIPC_Process(dwResult) then
   do this
else
   show error "LOST CONNECTION WITH FSUIPC"
end if

Does the FSUIPC_Process routine you are using have a short timeout? Does it have any retries? The C library I supply only gives a TimeOut error after 10 times timeouts of 2 seconds -- a full 20 seconds with no response.

There are also other reasons for an error return from FSUIPC_Process. It looks like your code is assuming a timeout when, in fact, it may be a data error. The C library can return these errors from FSUIPC_Process:

FSUIPC_ERR_NOTOPEN

FSUIPC_ERR_NODATA

FSUIPC_ERR_TIMEOUT

FSUIPC_ERR_SENDMSG

FSUIPC_ERR_DATA

Now whilst it is undoubtedly not one of the first two, you may need to distinguish between the others.

In my programs I simply Sleep() a little and try re-connecting (i.e. on error, FSUIPC_Close, then Open again, and retry). I do this until connection is made again. This takes care of long outages which can sometimes occur when FS is very busy doing file operations in menus and so on.

Regards

Pete