I did have the issue on a couple of occasions when the internet connection when down. However that may be entirely co-incidental.
I have connectivity problems with IB and they are still unresolved and the result is that they just kill the IB connection to the IB historical market data servers at frequent random intervals, especially in the US afternoon session.
However I think you could try to replicate this quite simply by try to download so much data from IB that you run into the "pacing violation" that IB slaps down when it detects too many requests from you. This lasts five minutes after appearing so in that time you could then try to reload historical data on a chart.
Actually just a thought, that might not replicate the error since it will never get any data rather than getting some and then being interrupted.

Comment