Error: Invalid value for shared scalar when assigning a scalar

ISAI student has asked for the wisdom of the Perl Monks concerning the following question:

Hello all. I am getting from these two lines of code (numbers 1244 & 1245):

print( "\$wave_tcl_file  is $wave_tcl_file\n");
${$$all_shary_for_subs{'%sim_info'}{$sim_ref}}{'tcl_file'} = $wave_tcl
+_file
[download]

And I am getting this output:

$wave_tcl_file is /scratch/ldagan/edata/eng/ldagan/voodoo_from_1.1.7.b4/Results/Log/0000___tc_dataif_simple.wave.tcl

Invalid value for shared scalar at /edata/eng/ldagan/voodoo_from_1.1.7.b4/DesignLibs/ScriptLib/Generic/WMPerl/voodoo//voodooBuild.pm line 1245.

Isn't $wave_tcl_file a scalar ? 1 line before it looked like a normal string...

Comment on Error: Invalid value for shared scalar when assigning a scalar Select or Download Code

Replies are listed 'Best First'.
Re: Error: Invalid value for shared scalar when assigning a scalar by kennethk (Abbot) on Apr 23, 2013 at 16:26 UTC
I expect that the problem is not `$wave_tcl_file`, but rather is `$all_shary_for_subs`. I assume you are using threads::shared and `$all_shary_for_subs` is declared with `:shared`. As the docs say, Shared variables can only store scalars, refs of shared variables, or refs of shared data Without seeing more information around your block, I would guess you are trying to store an anonymous hash in your shared variable. #11929 First ask yourself `How would I do this without a computer?' Then have the computer do it the same way.	[reply] [d/l] [select]
Re^2: Error: Invalid value for shared scalar when assigning a scalar by ISAI student (Scribe) on Apr 24, 2013 at 09:25 UTC
Thanks. There was a typo in the code. The toplevel hash was not shared.	[reply]
Re: Error: Invalid value for shared scalar when assigning a scalar by BrowserUk (Patriarch) on Apr 23, 2013 at 17:03 UTC
You cannot autovivify multi-level hash elements in shared hashes. They must be created & shared explicitly. With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday' Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". In the absence of evidence, opinion is indistinguishable from prejudice.	[reply]