# Help with QLF

**URL:** <https://swi-prolog.discourse.group/t/help-with-qlf/1087>\
**Category:** Help!\
**Created:** [August 18, 2019, 8:50pm UTC](https://swi-prolog.discourse.group/t/help-with-qlf/1087 "2019-08-18T20:50:09Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![nxiao](https://avatars.discourse-cdn.com/v4/letter/n/f0a364/32.png) [@nxiao](https://swi-prolog.discourse.group/u/nxiao)\
**Post date:** [August 18, 2019, 8:50pm UTC](https://swi-prolog.discourse.group/t/help-with-qlf/1087/1 "2019-08-18T20:50:09Z")

</div>

I’m using: SWI-Prolog version 8.11

I want the code to: qcompile prolog source into QLF. Then removed the source \*.pl. Load the program and found Permission error as below. Place the source \*.pl back and it loads without error.

But what I’m getting is: Permission error

```prolog
?- consult(library(coc/app/ip_app_setting)).
[main] [16:43:31.670] [error] No permission to load source `e:/packs/boot/prolog/coc/app/ip_app_setting.qlf' (Non-module file already loaded into module ip_model_workflow; trying to load into user)
[main] [16:43:31.670] [error] In:
[main] [16:43:31.670] [error] [21] throw(error(permission_error(load,source,e:/packs/boot/prolog/coc/app/ip_app_setting.qlf),context(...,Non-module file already loaded into module ip_model_workflow; trying to load into user)))
[main] [16:43:31.670] [error] [19] $assert_load_context_module(e:/packs/boot/prolog/coc/app/ip_app_setting.qlf,user,[expand(true)]) at c:/program files/swipl/boot/init.pl:2615
[main] [16:43:31.670] [error] [18] $mt_do_load(<clause>(000000635711F2E0),library(... / ip_app_setting),e:/packs/boot/prolog/coc/app/ip_app_setting.qlf,user,[expand(true)]) at c:/program files/swipl/boot/init.pl:2212
[main] [16:43:31.670] [error] [17] setup_call_catcher_cleanup(system:with_mutex($load_file,...),system: $mt_do_load(<clause>(000000635711F2E0),...,e:/packs/boot/prolog/coc/app/ip_app_setting.qlf,user,...),_320,system: $mt_end_load(<clause>(000000635711F2E0))) at c:/program files/swipl/boot/init.pl:479
[main] [16:43:31.670] [error] [14] $load_file(library(... / ip_app_setting),user,[expand(true)]) at c:/program files/swipl/boot/init.pl:2100
[main] [16:43:31.670] [error] [9] <user>
[main] [16:43:31.670] [error] 
[main] [16:43:31.670] [error] Note: some frames are missing due to last-call optimization.
[main] [16:43:31.670] [error] Re-run your program in debug mode (:- debug.) to get more detail.
?- consult(library(coc/app/ip_app_setting)).
% library(coc/app/ip_app_setting): recompiling QLF file (out of date)
true.

?- consult(library(coc/app/ip_app_setting)).
true.

```

---

<div class="post-metadata">

**Author:** ![jan](https://yyz2.discourse-cdn.com/free1/user_avatar/swi-prolog.discourse.group/jan/32/4_2.png) [@jan](https://swi-prolog.discourse.group/u/jan)\
**Post date:** [August 19, 2019, 6:35am UTC](https://swi-prolog.discourse.group/t/help-with-qlf/1087/2 "2019-08-19T06:35:02Z")

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Doesn’t reproduce on a trivial example. Please assemble a complete suite to reproduce.