Possible compiler error - Do Until statement

[cloxwerx]

Working with a BX-24 program and converting to ZX-24 I find the following strange behavior:
Temperature is a fixed two column array. Lookup is within the table range.
This works on the BX and not on the ZX (never breaks out when Lookup is Greater):

Do Until (Lookup > TEMPERATURE(1,kk)) 'Find first entry which is less than Lookup millivolts
kk = kk+1 'Point to next entry
Loop

When I add an IF to the ZX version the code works as it should have with just the Do Until:

Do Until (Lookup > TEMPERATURE(1,kk)) 'Find first entry which is less than Lookup millivolts
If (Lookup > TEMPERATURE(1,kk)) Then
EXIT Do
End IF

kk = kk+1 'Point to next entry
Loop

Compiler error or programmer error?

Thanks,
Dennis

[mikep]

To help isolate the problem, try turning off the compiler optimization. Put this at the top of your PJT file:

[cloxwerx]

Thanks, Mike. That allowed the Do Until to function and the program proceeded to another impasse that I feel is a compiler error as well. Here's a code snippet:

Do Until (Lookup > TEMPERATURE(1,kk)) 'Find first entry which is less than Lookup millivolts
' If (Lookup > TEMPERATURE(1,kk)) Then
' EXIT Do
' End IF

kk = kk+1 'Point to next entry
' Call PutQueueStr(DisOutQue," " & Fmt(CSng(Lookup),0) &" " & Fmt(CSng(Temperature(1,kk)),0))
' Call Delay(1.0)
Loop
Call Delay(1.0)
Call PutQueueStr(DisOutQue," P")

' Temp=CSng((Lookup-TEMPERATURE(1,kk)))/CSng(TEMPERATURE(1,kk-1)-TEMPERATURE(1,kk))* _
' CSng(TEMPERATURE(2,kk-1)-TEMPERATURE(2,kk))+CSng(TEMPERATURE(2,kk))
Call PutQueueStr(DisOutQue," " & "Pre TEMPString")
Temp=71.4
TempString = "T=" & CStr(CInt(Temp)) 'Convert temperature to characters

I've commented out some of the debugging prints and a computation so very little remains for the compiler. When the loop falls through to the next PutQueStr I get a spurious character printed and nothing more which suggests the program is hung. The next PutQueStr doesn't happen. RAM used is less than 50 bytes, so stack problems should be out.

Thanks for your advice so far. And I thought I was going to try out my 1500 line BasicX program after testing this simple one. Looks like I should have been a beta tester. OOps, maybe I am

Dennis

[dkinzer]

I have confirmed the optimization error and a solution is being tested.

I have not yet been able to replicate the second problem. I attempted to construct a compilable program using the data that you provided but I apparently missed something because it works as expected. Of course, I had to make some assumptions about the parts that aren't shown. Here is what I tried:

[mikep]

As a point of order, it might be better to start a new problem in a new thread.

My immediate thought is that your queue is full. I didn't see the consumer code that takes data off the queue. However I"m assuming this code runs under BasicX so it might be something different. Again the trick as you have been doing is to isolate the problem to a small amount of code.

Mike

[cloxwerx]

Thanks, Don and Mike. I'll pare the code down and see if I can get it to a smaller defined problem. I'll start a new thread with that.

Dennis