Hallo!
First: do you use the autobuilds or the "stable" pd-extended ?
what is the problem that (in pd-extended) abbreviated object classes like mtx_+ cannot be instantiated, I have to create mtx_add before.
Because the hexloader was broken - I don't know if this is already fixed in the autobuilds ...
I think this is a known problem, but is there a solution to fix this? also, some of the objects can't be created, but I am not sure why for example mtx_add is one of these. is there a nameclash so that iemmatrix is not loaded by default?
I once included all the iemmatrix objects and also it's aliases. They should be in the nightly autobuild version, although I don't know if the hexloader works (at least it should work with mtx_add, mtx_div, ...). However, I don't think that they should be loaded by default, but that's an other discussion ... ;)
LG Georg