# Why would modifying concurrent requests fix a connection to an Allen-Bradley CompactLogix (Legacy)? **URL:** \ **Category:** Ignition\ **Tags:** ignition81\ **Created:** [November 29, 2022, 1:29am UTC](https://forum.inductiveautomation.com/t/why-would-modifying-concurrent-requests-fix-a-connection-to-an-allen-bradley-compactlogix-legacy/67009 "2022-11-29T01:29:19Z")\ **Posts on this page:** 1\ **Showing post:** 3
**Author:** ![bmeyers](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/bmeyers/32/37453_2.png) [@bmeyers](https://forum.inductiveautomation.com/u/bmeyers)\ **Post date:** [November 29, 2022, 1:36am UTC](https://forum.inductiveautomation.com/t/why-would-modifying-concurrent-requests-fix-a-connection-to-an-allen-bradley-compactlogix-legacy/67009/3 "2022-11-29T01:36:20Z")
> But what does that actually mean in the context of Ignition? Also I saw a similar issue from 2011 so it is an old problem. > [@Concurrent Requests](https://forum.inductiveautomation.com/t/concurrent-requests/2656): > > Something strange I noted yesterday. I was connected to one of my CompactLogix PLCs via RSLogix 5000 so I could watch incoming data. At the same time I had just started a new historical transaction group on Ignition to log this data using a trigger with the OPC data mode set to read. I tried triggering the data log numerous times with no success. I also noted I was missing one tag due to my oversight so I went to my OPC tag list to get it only to find it wasn’t there. Since this tag had on… Is it possible this is due to this networks overloaded network in terms of bandwidth? --- _[View the full topic](https://forum.inductiveautomation.com/t/why-would-modifying-concurrent-requests-fix-a-connection-to-an-allen-bradley-compactlogix-legacy/67009)._