Everything runs fine whilst the script is executing, but Origin seems to intermittently hang; the script stops executing, and attempts to exit Origin result in a Dr Watson message and dump.

I've included the server script below; is there an obvious error in it that could be leading to the deadlocks?

// Labview/Origin plotting server
// Waits for a signal from OriginDDE.vi indicating that
// data is ready to be plotted, then loads scripts/Autoplot.txt
// to plot it.

%Z=FALSE;
for (;1==1 {
idLabview=-1;
for (;idLabview==-1 {
dde -c labview|origin idLabview;
if (idLabview==-1) type -q Labview is not responding. Note that this script must be running on the same desktop as Labview!;
second -p 1;
};

type -q Labview responded;
dde -r idLabview DataReady;
if (%Z=="TRUE") {
type -q Data Ready;
run scripts/AutoPlot.txt;
dde -p idLabview DataReady FALSE;
};
else {
type -q Waiting for data;
};

dde -r idLabview Shutdown;
if (%Z=="TRUE") {
type -q Shutdown request. Remember- a goat is for life, not just for Christmas!;
second -p 5;
break 1;
};

Perhaps replacing document -n with code that cleans up only those windows and variables that are accumulating due to your script would solve the problem.

If you need to define a lot of variables for a Script, consider beginning their names with a common root, such as:

• ddevar1
  
• ddevar2
  
• dderesult
  
• ddetest
  

del -v dde*;