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Hi,
I have updated edml connection string in Database explorer with new port number,
saved and rebuild but when running app (mvc with webapi) it uses previous port 1521.
The result is I'm getting NET: Invalid SID error
Cannot find anywhere embedded that number in code, where is it taken from?

1521 is the default port number. Refer to https://www.devart.com/dotconnect/oracl ... tring.html.

Enable the dbMonitor tool and check actual connection string used by runtime of your application.

I know 1521 is default port, I have changed it and it still exist somewhere.

Connection string on DBMonitor seems to be OK:

Open connection: "User Id=xxxxx;Password=yyyyy;Server=zzzzzzz;Direct=True;Sid=abc;Persist Security Info=True" Error
Connect: "User Id=xxxxx;Password=yyyyy;Server=zzzzzzz;Direct=True;Sid=abc;Persist Security Info=True" Error

NET: Invalid SID

I can connect fine with oracle developer to that database with these credentials

Question is can I change default port for oracle dot connect?

Your connection string doesn't include the Port parameter. Please add "Port=your_value;" to the connection string.

When you update your connection string in *.edml via Tools > Entity Developer > Database Explorer, this should update the connection string in *.edps. And the new connection string should be used by your context constructor after you save the model to regenerate the code.

Thats true 1521 is default port, ok, will try it out thanks for the information