# Mwfeval for Mworks 0.9

**URL:** <https://mworks.discourse.group/t/mwfeval-for-mworks-0-9/238>\
**Category:** Support\
**Created:** [July 19, 2019, 2:26pm UTC](https://mworks.discourse.group/t/mwfeval-for-mworks-0-9/238 "2019-07-19T14:26:06Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![cstawarz](https://yyz1.discourse-cdn.com/flex031/user_avatar/mworks.discourse.group/cstawarz/32/3_2.png) [@cstawarz](https://mworks.discourse.group/u/cstawarz)\
**Post date:** [July 19, 2019, 2:26pm UTC](https://mworks.discourse.group/t/mwfeval-for-mworks-0-9/238/1 "2019-07-19T14:26:06Z")

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Hi Chris,

I have had to recently update the Mworks version in my experiment rig to 0.9, but the computer I am using to convert data into Matlab files cannot run this latest version (my current Mac OS 10.10.3, so it’s incompatible with Mwork 0.9). When I run the code I normally run to convert Mworks file to a Matlab file (using getCodecs, etc.) I now get an error saying:  
\*\*  
Error using mwfeval  
Cannot open file  
“/Volumes/hansem/Documents/MWorks/Data/H\_20190703\_RSGadapt.mwk2/H\_20190703\_RSGadapt.mwk2”

Error in getEvents\>@()mworks.mwfeval(mfilename,filename,codes,mintime,maxtime) (line 38)  
f = @() mworks.mwfeval(mfilename, filename, codes, mintime, maxtime);

Error in getEvents (line 41)  
events = f();

Error in getCodecs (line 6)  
for evt = getEvents(filename, 0)  
\*\*

I only get this error if I try to convert one of the files from the new Mworks version (.mwk2 files) but not with .mwk files. I’m assuming mwfeval from my current Mworks version (0.6) simply does not support mwk2 files. Is there any workaround this, or do I absolutely need to find a way of installing the Mworks 0.9 on the machine? This would require me changing my entire OS, so if I can avoid it, that’d be great!

Thanks for your help,  
Nicolas

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<div class="post-metadata">

**Author:** ![cstawarz](https://yyz1.discourse-cdn.com/flex031/user_avatar/mworks.discourse.group/cstawarz/32/3_2.png) [@cstawarz](https://mworks.discourse.group/u/cstawarz)\
**Post date:** [July 19, 2019, 2:36pm UTC](https://mworks.discourse.group/t/mwfeval-for-mworks-0-9/238/2 "2019-07-19T14:36:52Z")

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Hi Nicolas,

> I’m assuming mwfeval from my current Mworks version (0.6) simply does not support mwk2 files.

That is correct.

> Is there any workaround this, or do I absolutely need to find a way of installing the Mworks 0.9 on the machine?

You need MWorks 0.9 to read MWK2 files.

Cheers,  
Chris

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<div class="post-metadata">

**Author:** ![cstawarz](https://yyz1.discourse-cdn.com/flex031/user_avatar/mworks.discourse.group/cstawarz/32/3_2.png) [@cstawarz](https://mworks.discourse.group/u/cstawarz)\
**Post date:** [July 19, 2019, 4:18pm UTC](https://mworks.discourse.group/t/mwfeval-for-mworks-0-9/238/3 "2019-07-19T16:18:05Z")

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Hi Chris,

Thanks for the fast reply. I have found a machine on which I could install Works 0.9, but now I get the following error while trying to convert MWorks to Matlab:

Error using mworks.mwfeval  
Invalid MEX-file ‘/Library/Application Support/MWorks/Scripting/Matlab/+mworks/mwfeval.mexmaci64’: dlopen(/Library/Application Support/MWorks/Scripting/Matlab/+mworks/mwfeval.mexmaci64, 6): Symbol not found: \_\_ZN2mw14DataFileReader12openDataFileERKN12mworks\_boost10filesystem4pathE  
Referenced from: /Library/Application Support/MWorks/Scripting/Matlab/+mworks/mwfeval.mexmaci64  
Expected in: /Library/Frameworks/MWorksCore.framework/Versions/A/MWorksCore  
in /Library/Application Support/MWorks/Scripting/Matlab/+mworks/mwfeval.mexmaci64.

Error in getEvents\>@()mworks.mwfeval(mfilename,filename,codes,mintime,maxtime) (line 38)  
f = @() mworks.mwfeval(mfilename, filename, codes, mintime, maxtime);

Error in getEvents (line 41)  
events = f();

Error in getCodecs (line 6)  
for evt = getEvents(filename, 0)

Error in convertMWtoMAT\_RSG2prior (line 22)  
codes = getCodecs(file);

Any idea?

Thanks for your help,  
Nicolas

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<div class="post-metadata">

**Author:** ![cstawarz](https://yyz1.discourse-cdn.com/flex031/user_avatar/mworks.discourse.group/cstawarz/32/3_2.png) [@cstawarz](https://mworks.discourse.group/u/cstawarz)\
**Post date:** [July 19, 2019, 4:25pm UTC](https://mworks.discourse.group/t/mwfeval-for-mworks-0-9/238/4 "2019-07-19T16:25:46Z")

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Hi Nicolas,

I’m guessing you copied `mwfeval.mexmaci64` from a machine with MWorks 0.9 installed to a machine with a different version of MWorks. You can’t do that. The `.mexmaci64` file is linked to the MWorksCore framework. It will only work with the MWorks version it came from.

Chris

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<div class="post-metadata">

**Author:** ![cstawarz](https://yyz1.discourse-cdn.com/flex031/user_avatar/mworks.discourse.group/cstawarz/32/3_2.png) [@cstawarz](https://mworks.discourse.group/u/cstawarz)\
**Post date:** [July 19, 2019, 7:10pm UTC](https://mworks.discourse.group/t/mwfeval-for-mworks-0-9/238/5 "2019-07-19T19:10:31Z")

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Ok thanks, it turns out Matlab was calling mwfeval from the Mworks backup folder following the upgrade.

Best,  
Nicolas

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<div class="post-metadata">

**Author:** ![cstawarz](https://yyz1.discourse-cdn.com/flex031/user_avatar/mworks.discourse.group/cstawarz/32/3_2.png) [@cstawarz](https://mworks.discourse.group/u/cstawarz)\
**Post date:** [July 19, 2022, 8:48pm UTC](https://mworks.discourse.group/t/mwfeval-for-mworks-0-9/238/6 "2022-07-19T20:48:17Z")

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