Never had this problem for years until recently. Inside the last minute of the day, (3:59) my stock quotes stop updating. I assume its volume related and I have a good load on the cpu but no more than I did when it worked perfectly. Anyone else see this with TWS?
Today around 3:50, my TWS sort of froze up as well. Everything was updating fine, but two market orders I sent in returned errors, that they weren't yet received by the exchange. I restarted TWS and found that both market orders had indeed gone thru, and that for some reason TWS hadn't received the "Transaction Completed" message. A little alarming, to say the least.
That's a different kind of error. The one I'm seeing in within the last minute of the main session only, and clears itself a few seconds after the 4pm close.