Cannot add an additional parameter to custom block

Hi all,

I got my things working, up to the point where I decided that an
additional parameter in my custom block would be very helpful. But for
some reason, GRC keeps holding on to my previous version of the block
with 3 parameters instead of my new one with 4 parameters. In the end,
after numerous fails, I did the following:

  • I deleted the existing block from my module using “gr_modtool rm
    MY_BLOCK”
  • I deleted the build folder
  • I added MY_BLOCK again using gr_modtool and filled in some additional
    C++ code
  • I changed the XML file to reflect the additional parameter
  • I deleted various files from /user/…, such that ‘sudo make install’
    did not report files already up-to-date: everything was newly installed

In GRC the custom block shows the additional parameter (a bool, with
options ‘On’ or ‘Off’), but when trying to run GRC it reports:

“TypeError: Required argument ‘XXX’ (pos 4) not found”.

It boils down to top_block.py, where I see a call to my block with only
3 parameters while in all files I can see, 4 parameters are defined. If
I delete this file, it is of course regenerated with the same error.
Somewhere a file resides which still has the previous definition of the
block with only 3 parameters instead of the new one with 4 parameters
and GRC relies on that.

Any ideas how to solve this are very welcome :slight_smile:

 Jeroen

Hi Jeroen,

On 01/21/2014 01:57 PM, [email protected] wrote:

  • I changed the XML file to reflect the additional parameter

It boils down to top_block.py, where I see a call to my block with
only 3 parameters while in all files I can see, 4 parameters are
defined.

Sounds like you haven’t updated the template in “…” (in
your blocks’ XML description).

If that doesn’t help, could you maybe post the XML?

Sebastian


Karlsruhe Institute of Technology (KIT)
Communications Engineering Lab (CEL)

Dipl.-Ing. Sebastian Koslowski
Research Associate

Kaiserstrae 12
Building 05.01
76131 Karlsruhe, Germany

Phone: +49 721 608-46275
Fax: +49 721 608-46071
Email: [email protected]
Web: http://www.cel.kit.edu/

KIT University of the State of Baden-Wuerttemberg and National
Research Center of the Helmholtz Association

Koslowski, Sebastian (CEL) schreef op 2014-01-21 15:16:

Sounds like you haven’t updated the template in “…” (in
your blocks’ XML description).

If that doesn’t help, could you maybe post the XML?

Sebastian

How could I be so stupid to overlook that line, spent nearly 3 hours on
this… In my first attempt I apparently only added the additional

, and in further attempts (newly generated block) I also copied the erroneous line into the new xml-file.
   :-|

Anyway, you saved my day, it works again. Thanks!

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