I get the following when starting Houdini 17.0.352 even after redownloading the hota and installing it.
Houdini DSO Error
(127)
C:/Users/xxxx/htoa/htoa-3.2.0_r9e131b_houdini-17.0.352/htoa-3.2.0r9e1313b_houdini-17.0.352/dso/htoa_core.dll.
This is probably because this file was intended for use with a different version.
Probably an environment setup problem. I would check the houdini.env, and review the info from Help > About Houdini > Show Details
I found a dll file in the wrong location remove it and the problem was fixed. As a side note I also discovered an interesting item while trouble shooting with my env file. Arnold and Redshift conflict if use in the same environment. The fix that I found was to use single line for both path statements and have the htoa prior to the redshift entry.