Visa problem using compiled vi (.exe) with labview 7.1

[massi1970]

Hi people,

in order to automatically recognize wich com port is connected to a device I've used the "Visa Find Resource" with this string ASRL?*INSTR{VI_ATTR_ASRL_BAUD ==19200} to check only com devide with baude rate at 19200.

After the research I try to write to all (in sequence) the serial port found a command ($A) waiting for 4 bytes returned or time exceding.

In fact the device connected answers only with command "$A" (with 2 bytes).

If time is exceeded (2000 ms) and 4 bytes are not present on serial port the vi goes to the next port found.

If on none of the port found 4 byte are present the device is non tonnected.

This vi runs fine if it is launched into labview (7.1), but if it is compiled and I use the exe program I never find the device.

Otherwise it seems to run too fast as expected (few ms).

Have you any idea of which tipe of error I made?

Thanks

Massimiliano.