Updating MtoA with Arnold

MtoA ships with Arnold 4.2.13.

If you want to take advantage of the improvements in Arnold (like the increase  in the maximum number of threads from 128 to 256), here’s what you need to do:

  • Download  Arnold and extract the archive
  • Replace Arnold (libai.so, ai.dll, libai.dylib), kick, and maketx in the MtoA bin folder with the versions from the Arnold download
  • Replace the Arnold Python bindings in  the MtoA scripts/arnold folder with the Python bindings from the Arnold python/arnold folder. For example, replace this folder:

    with the python\arnold folder from the Arnold download. For example:


You must update the Arnold Python bindings, otherwise MtoA won’t load. That’s because Arnold included a number of API changes, including the removal of some API (like AiLicenseSetServer). The older Python bindings still refer to the removed API, so there will be Python errors that prevent MtoA from loading.