opac-convert : does not work with MULTI?

[Ielr]

When working with MUTLI tables opac-convert seems to focus on opacity tables (opr, opp, opz, eps) and don't try to open the EoS table (.multi). This results in the following error:
"The required EoS data for FLASH is not present...
Aborting the IONMIX file creation...
Warning: Missing EoS data for IONMIX file to run in FLASH"
Is there a simple way to fix this, or can we impose the EoS values to be constant (0)? I technically don't need the EoS only the opacities.