database - Visual Studio Pro 2012: local db connection keeps closing -

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i've tried searching this, seem if i'm person having problem. project in visual studio pro 2012, database connection keeps dropping constantly. seems random, clicking open table cause close, or writing new sql query. close right after click open it.

i poked around in 'modify connection' , didn't see help, tried upping connection retries 10. doesn't help, , apparently isn't saving either, because @ 1 when checked again.

it doesn't make sense - because transitioned virtual machine running locally, using amazon workspaces. none of data or settings migrated over. also, coworker has same exact setup, , never has problems. working on same project, using same database.

anyone have ideas? highly irritating.

thanks


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