How to Clear the Interactive Brokers Cache

Incorrect IB symbol settings or symbol mapping settings might get saved in the IB symbol cache.
In that case, re-configuring symbol mapping as suggested in the Expired cache for symbol X. Remove and re-add the symbol mapping for this symbol message might not help.

Here’s how to clear the IB cache to resolve it:

1. Close all the charts with the problematic symbols.
2. Re-add the problematic symbols in QuoteManager → Instrument → Add Symbol → From Data Source.
3. Go to File → Broker Profiles → Symbol Mapping → select to Show mapped symbols for Interactive Brokers → select the symbol mapping lines with problematic symbols and click Remove.
4. Go to the main MultiCharts window → Help → Support → Open Logs Folder.
5. Close all the MultiCharts apps and make sure there are no MC processes left in Task Manager → Details tab → Description column.
6. Delete DAT files starting with IB in the Logs folder (see step 4).
7. Open MultiCharts and set up symbol mapping for the required symbols.