# Adding Overlay for given bit file is not working 'NoneType' object has no attribute 'split' Error in hwh\_parser.py

**URL:** <https://discuss.pynq.io/t/adding-overlay-for-given-bit-file-is-not-working-nonetype-object-has-no-attribute-split-error-in-hwh-parser-py/7038>\
**Category:** Support\
**Created:** [May 22, 2024, 12:21pm UTC](https://discuss.pynq.io/t/adding-overlay-for-given-bit-file-is-not-working-nonetype-object-has-no-attribute-split-error-in-hwh-parser-py/7038 "2024-05-22T12:21:03Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Anik\_Basu\_Bhaumik](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.pynq.io/anik_basu_bhaumik/32/5894_2.png) [@Anik\_Basu\_Bhaumik](https://discuss.pynq.io/u/Anik_Basu_Bhaumik)\
**Post date:** [May 22, 2024, 12:21pm UTC](https://discuss.pynq.io/t/adding-overlay-for-given-bit-file-is-not-working-nonetype-object-has-no-attribute-split-error-in-hwh-parser-py/7038/1 "2024-05-22T12:21:03Z")

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Pynq image - 2.7  
Board - Pynq-Z2  
hwh file :  
[design\_1.hwh](https://discuss.pynq.io/uploads/short-url/w2NWB2XlSWxmLF3jrq5L9Wv39yO.hwh) (332.2 KB)

[design\_1\_wrapper.bit](https://discuss.pynq.io/uploads/short-url/kU1lWlealItwwLMKU5Hf32baM87.bit) (3.9 MB)

I am loading this bitfile and the hwh file and then I cannot load the overlay. I am getting error ‘NoneType’ object has no attribute ‘split’

 ![Screenshot from 2024-05-22 17-49-58](https://us1.discourse-cdn.com/flex019/uploads/pynq1/original/2X/1/143de26bf176128c8e63d4f5a86ed51065382678.png)  
This is the block design of softcore linked zynq