Hello,
I am newbie with houdini. For a few days I have been following tutorials.
But I have a problem, since yesterday a node like the "merge" or "matchsize" are missing when I press "tab", it does not appear in the list. On the other hand, when I reload my 1st tutorial, all the nodes are available.
thank you and sorry if the question is very basic, but I can't continue the tutorials

The tab menu contents depend on where and when it is opened. Pay attention to the 'context' of the node graph when opening. Merge and Matchsize are 'SOP' nodes and are only available in the geometry context.

thanks, i just understood. Indeed I did not pay attention to the context, and the difference between object and geometry context :S