modalDamping command problems

[Motaei]

Dear users
I'm trying to use modalDamping command recommended by prof. Chopra
but apparently the command does not work with some of the integrators provided in OpenSees
I've used modalDamping command with central difference, generalized-alpha and KRAlphaExplicit integrators and the following error appears when I run the code:

IncrementalIntegrator: :getVel<> - not implemented for this integrator

Is there any way that I can use the modal command with the mentioned integrators?
and if there is, can you please provide me with a reference to do so.
Thanks for your time

[fmk]

not till the code is changed and released. if you want to build your own version you could modify said integators to return the vel they are computing .. POST ONCE IN FUTURE

[Motaei]

Many thanks for your reply