Why Does This Throw Error 1162?

[paul_cardinale]

This bug has been driving me nuts.  I've trimmed the code down to a tiny piece that fails.

This throws error 1162:

No error here:

Why do I get an error when I pass the empty string through a cluster?

[BertMcMahan]

While I can't answer your question, I can confirm I get the same results on my LV2018/32 bit installation.

The weird thing is... if you delete the text "APP_FILE" in the String constant inside the Cluster constant, it works. You can replace it with other text and it fails. Looks like a bug to me. I wonder if it has something to do with the compiler doing some constant folding shenanigans?

[oscarfonseca]

I was also able to reproduce the behavior in 2019 and found the same pattern described in the previous post: if the string constant in the cluster is empty, then there's no error.

I have filed Bug #993017 for the appropriate team to further investigate and follow-up.

Thanks!

[paul_cardinale · Accepted solution]

I've discovered that in my little snippet, I can fix the problem with either this:

or this:

but neither fixes the problem in my real app.  In order to fix it in my real app, I have to do this:

[paul_cardinale]

And now in my main app, it's broken again.  The "Always copy" and "Type cast" functions are no longer effective.

[mcduff]

No error with the following,

You can always try another way to make a copy with this

(Note your snippet with the typecast and always copy did not produce an error.)

mcduff

[paul_cardinale]

This works.  You've got to trick the compiler into not inlining stuff.

[paul_cardinale]

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@paul_cardinale wrote:

This works.  You've got to trick the compiler into not inlining stuff.

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And now that doesn't work anymore.

[paul_cardinale]

Whether or not this bug is manifest seems to depend on whether the block diagram that owns "Get Menu Item Info" has ever been opened.