what causes this error?
Param #1 out of bounds of vsvtx_prep()
Param #2 out of bounds of vsvtx_prep()
Param #3 out of bounds of vsvtx_prep()
Param #1 out of bounds of vsvtx_prep()
Param #2 out of bounds of vsvtx_prep()
Param #3 out of bounds of vsvtx_prep()