# Loading missing://

**URL:** <https://cwl.discourse.group/t/loading-missing/964>\
**Category:** CWL Questions\
**Created:** [December 4, 2024, 6:46pm UTC](https://cwl.discourse.group/t/loading-missing/964 "2024-12-04T18:46:16Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![peterg1t](https://yyz2.discourse-cdn.com/free1/user_avatar/cwl.discourse.group/peterg1t/32/462_2.png) [@peterg1t](https://cwl.discourse.group/u/peterg1t)\
**Post date:** [December 4, 2024, 6:46pm UTC](https://cwl.discourse.group/t/loading-missing/964/1 "2024-12-04T18:46:16Z")

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I was revisiting a pipeline and this exception showed up.

```auto
Got exception 'No available job store implementation can import the URL 'missing:'. Ensure Toil has been installed with the appropriate extras.' while copying 'missing://'

```

How can I debug and see more information about what are these missing imports? I’m using cwltool==3.1.20240508115724 which I have installed using

```auto
pip install 'toil[all]'

```

Any ideas on what is causing this? Thank you very much for your help!  
Pedro

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**Author:** ![mrc](https://yyz2.discourse-cdn.com/free1/user_avatar/cwl.discourse.group/mrc/32/3_2.png) [@mrc](https://cwl.discourse.group/u/mrc)\
**Post date:** [December 4, 2024, 6:49pm UTC](https://cwl.discourse.group/t/loading-missing/964/2 "2024-12-04T18:49:39Z")

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Hello @peterg1t ; I think this is a toil issue. A file is missing, but you got an unhelpful error message. There is an existing open issue: [Toil can complain that it can't import `missing:` protocol files, instead of that a particular user-supplied URL points to a missing file · Issue #5174 · DataBiosphere/toil · GitHub](https://github.com/DataBiosphere/toil/issues/5174) . Perhaps you can comment there?

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<div class="post-metadata">

**Author:** ![peterg1t](https://yyz2.discourse-cdn.com/free1/user_avatar/cwl.discourse.group/peterg1t/32/462_2.png) [@peterg1t](https://cwl.discourse.group/u/peterg1t)\
**Post date:** [December 4, 2024, 8:42pm UTC](https://cwl.discourse.group/t/loading-missing/964/3 "2024-12-04T20:42:45Z")

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Thank you Michael! I have added a comment over there as suggested.