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gr_modtoolgives some options of block types while creating a new block. The options are as follow:

('sink', 'source', 'sync', 'decimator', 'interpolator', 'general', 'tagged_stream', 'hier', 'noblock')

I have explored those options but I have not found any one related to pure Message Passing blocks

Is there any tool similar or option on gr_modtool for pure Message Passing blocks?

André Gomes
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Currently it looks like pure message blocks are not directly supported by gr_modtool. There is a pretty easy work around, just create a sink or source block, set all the inputs to "None" and set up the message handlers/posters as if you had created a pure message block. You can then edit the XML definition as desired.

Jonathan Rawlinson
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