Amibroker crashing when user changes PLUGINS all the time

Data Sources
1

I have both Norgate and DTN IQFeed. When I open DTN IQFeed and run an optimization, Amibroker shuts down. I'm running 6.90.5. The workarounds I'm considering are creating separate Windows users accounts or using a VM where each database resides on a separate instance. This is not optimal and if there's a way to run both databases on one instance, I'd like to know how. Thanks.

2

It is unclear because subject says something else than body of the message. Putting them together suggests that you are switching DBS while optimization is I
progress . Obviously switching databases while optimization is under way is really bad idea

3
  1. I open the Norgate database.
  2. I run an optimization. The optimization finishes.
  3. I click File->Database settings
  4. I select Data source: DTN IQFeed data Plug-in.
  5. I change the Base time interval to 5 Minute. I hit Ok.
  6. I get a warning about the number of bars, in this case 40 years worth.
  7. I change the Analysis settings Periodicity from Daily to 5 minutes. I hit Ok.
  8. I run an Optimization using the same AFL as I did with Norgate.
  9. Amibroker crashes.

Clear enough?

4

That is incorrect way of doing things.
Data source (plugin) in File->Database Settings should be SET ONCE.

If you want to change data sources, you should create TWO DATABASES,
one with Norgate as data source and second database with IQFeed as data source.
And from now on change databases / data sources using
File->Open Database