# I am trying to add an additional 'int' parameter in an OOT module

**URL:** <https://www.ruby-forum.com/t/i-am-trying-to-add-an-additional-int-parameter-in-an-oot-module/252987>\
**Category:** GNU Radio\
**Created:** [September 6, 2019, 12:45pm UTC](https://www.ruby-forum.com/t/i-am-trying-to-add-an-additional-int-parameter-in-an-oot-module/252987 "2019-09-06T12:45:51Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![mia](https://www.ruby-forum.com/user_avatar/www.ruby-forum.com/mia/32/1165_2.png) [@mia](https://www.ruby-forum.com/u/mia)\
**Post date:** [September 6, 2019, 12:45pm UTC](https://www.ruby-forum.com/t/i-am-trying-to-add-an-additional-int-parameter-in-an-oot-module/252987/1 "2019-09-06T12:45:51Z")

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I have a functioning OOT block in GNU radio. I am just trying to add an extra parameter to it to increase the block’s flexibility via GRC .

I have made appropriate modifications in all the .h, .cc files corresponding to the block as well as the .cxx and swig.py. While executing the block, I still get an error saying ‘RuntimeError: More keyword list entries (7) than format specifiers (6)’ Im unable to find why. Is there an online resource apart from GNU tutorial which can guide me. I just found tutorials to create an entire new block, nothing to modify.