zero modal mass participation during analysis and zero base shear due to RSx and RSy, and how to do correction?

Dear sir,

While doing analysis of a building, I found that the mass participation is zero and time period is unusually large and the base shear is zero due to dynamic analysis so the scaling also cannot be done.

It would be a great help if you can suggest me the corrections that I can make.

Thank you,

Er. Mukesh Shrestha

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