I have tried to migrate from old S7 5.6  to TIA v17. Getting a lot of errors related with DB's i have attached screenshot for reference 

i followed the procedure from the manual and i copy all the DB from 840Dsl_MigrationDummyLib. What can be the reason? How i can fix it?

Hi,

A brief scan of your error log shows many of the block errors are reported from the PLC base program. Have you referenced the "SINUMERIK 840D sl: STEP7 Toolbox for SINUMERIK - Programming recommendation for changers" manual?

https://support.industry.siemens.com/cs/ww/en/view/109478721

Hope this helps

Luke