I reported this bug december 2005, and just recently checked if it was still present in LabVIEW 8.2 (sorry I don't have a CAR for this one).

/J
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The Problem.vi contains a pre-allocated array, that is populated by using a second array that is auto indexed in a FOR loop.

The crash:

1. LabVIEW crashes when closing the Problem.VI after it has been run.
2. LabVIEW also crashes sometimes, if you edit and try to save a VI (Caller vi), that has the Problem.VI in its sub-vi hierarchy (Caller VI must be run first in order to crash))

Solution:
Change the dimension size input (Initialize array) from constant to control (this changes the type of the array wires)

• the pre-allocated array changes from "1-D fixed size array [100] of" to "1D array of".
• the output from the Array subset node changes from "1-D bounded-size (sub) array [100] of" to "1-D (sub)array of"

In LabVIEW 7.1.1, I have the FPGA toolkit installed, maybe this is forcing LabVIEW to use a special version of the "Initialize array" node?
 LV7_1_1_Loop_bug.zip ( 14.16K ) Number of downloads: 98


This post has been edited by JFM: Jan 19 2007, 11:04 AM

The idea about FPGA might be interesting here. Earlier versions of LabVIEW did not support (or should I say use) fixed sized arrays although the typedescriptor explicitedly had this feature documented as long as the document about Typedescriptors exists. FPGA was to my knowledge the first environment really needing fixed size arrays so they pushed that.
The particular problem you see also seems a bit like pains of the early attempts to get the constant folding optimization into LabVIEW. Not sure if the FPGA Toolkit adds this feature to the LabVIEW environment but I rather think that it is there independant of the existence of the FPGA Toolkit (but can't currently check as I have the FPGA Toolkit also installed).

Rolf Kalbermatter

CAR# 3SL9US00.

/J

I've seen something related (most probably already reported too). It seems an array control or constant can remember that it was wired to a fixed size array. Then when you paste it somewhere else, the array wire does not allow to be changed size anymore. I was unable to remove the problem changing control/wire properties or by setting FPGA options off and restarting LV.

Workaround: create the wire/control again from scratch.