# Using dll DSP plugins FMOD error 54

**URL:** <https://qa.fmod.com/t/using-dll-dsp-plugins-fmod-error-54/14825>\
**Category:** FMOD Engine\
**Created:** [July 2, 2019, 7:03pm UTC](https://qa.fmod.com/t/using-dll-dsp-plugins-fmod-error-54/14825 "2019-07-02T19:03:51Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![MortXII](https://avatars.discourse-cdn.com/v4/letter/m/7bcc69/32.png) [@MortXII](https://qa.fmod.com/u/MortXII)\
**Post date:** [July 2, 2019, 7:03pm UTC](https://qa.fmod.com/t/using-dll-dsp-plugins-fmod-error-54/14825/1 "2019-07-02T19:03:51Z")

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Hi all,

I’m trying to use the dsp plugin examples in the low level api with the dsp\_custom example.

I seem to be able to load the plugins fine with

> result = system-\>loadPlugin(“fmod\_distance\_filter.dll”, 0, 0);  
> ERRCHECK(result);

but any further attempt to interact with it such as through

> result = system-\>createDSPByPlugin(0, &dllDsp);  
> ERRCHECK(result);

ends up getting the following error:

> FMOD error 54 - A requested output, dsp unit type or codec was not available.

Am I simply loading the plugin incorrectly? I’ve been following the instructions found in; [https://www.fmod.com/resources/documentation-api?version=1.10&page=content/generated/overview/plugin\_api\_dsp.html](https://www.fmod.com/resources/documentation-api?version=1.10&page=content/generated/overview/plugin_api_dsp.html)

Thanks in advance!

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<div class="post-metadata">

**Author:** ![cameron-fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/cameron-fmod/32/261_2.png) [@cameron-fmod](https://qa.fmod.com/u/cameron-fmod)\
**Post date:** [July 8, 2019, 12:50am UTC](https://qa.fmod.com/t/using-dll-dsp-plugins-fmod-error-54/14825/2 "2019-07-08T00:50:32Z")

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The filename of the plugin needs to be the full path including the file name.