Record class in binary with TypeDef Enum object

I'm curious to know if this is expected behavior. I'm trying to save a class object to a binary file. In the private class data, I have an enum of the def type. If the type def change once the data has been written to disk, the data back out restores the default value of the enum.

I have worked under the assumption that "Labview automatically creates algorithms to change data from the old format to the new format when you change your private data" (cited directly in the section on storage of objects of the class on the disk in the oriented object programming in labview course). It doesn't seem to be valid in this case. I've attached an example that illustrates. To reproduce:

1. run "Write Binary.vi" and a binary file will be saved with the value enum Val3.

2. make run 'read Binary.vi. ' The results should be Val3 as expected.

3. open "TypeDefEnum.ctl" and remove Val2 from the list of enum.

4. make sink "read Binary.vi". The result will now be Val1, Val3 not.

EDIT:

Should have added, I'm on Windows7, 64-bit, sp1 Labview 2012

It turns out this is a known issue and it has been documented in CAR 48516.

Tags: NI Software

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