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

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.