# I can't open Slicer with Guidelet module

**URL:** <https://discourse.slicer.org/t/i-cant-open-slicer-with-guidelet-module/7715>\
**Category:** Development\
**Created:** [July 23, 2019, 3:09am UTC](https://discourse.slicer.org/t/i-cant-open-slicer-with-guidelet-module/7715 "2019-07-23T03:09:51Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Zhao\_Su](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/zhao_su/32/3678_2.png) [@Zhao\_Su](https://discourse.slicer.org/u/Zhao_Su)\
**Post date:** [July 23, 2019, 3:09am UTC](https://discourse.slicer.org/t/i-cant-open-slicer-with-guidelet-module/7715/1 "2019-07-23T03:09:51Z")

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![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/c/8/c823c75932e364f5b837c79c37e20c3bf8ca0e94.png)  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/d/0/d043f87f72a2be35b4ee7b834aef5a26d8eb50ec.png)

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**Author:** ![cpinter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/cpinter/32/7995_2.png) [@cpinter](https://discourse.slicer.org/u/cpinter)\
**Post date:** [July 23, 2019, 1:54pm UTC](https://discourse.slicer.org/t/i-cant-open-slicer-with-guidelet-module/7715/2 "2019-07-23T13:54:47Z")

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I think you need to enter a space after --python-code.

By the way the Guidelet module is a template that contains a base class that you need to subclass and implement to do anything. Or have you simply repurposed the class and developed an actual Guidelet in it?