For comparison, 32-bit RDCMan (with /LARGEADDRESSAWARE) started failing (error 3334) after opening 23 connectionsĪnd maxing out its VM limit (4 GB), while also being noticeably slower than the 64-bit one in refreshing thumbnails. VMMap showed that the application used 4.5 GB of virtual memory. To be precise: this switches the exe to "An圜PU", so it will run as 32-bit on 32-bit OS and as 64-bit on 64-bit OS.Īs a quick test, I was able to connect to 25 servers and work without problems. Using the corflags utility I was able to switch RDCMan to 64-bit: It runs as a 32-bit process by default only because the executable is marked so. NET application (and the Remote Desktop ActiveX control it uses is available both to 32-bit and to 64-bit processes), it could, in fact, run as a 64-bit process on 64-bit systems, which would effectively eliminate any memory limit. LARGEADDRESSAWARE is a nice first step (it enables RDCMan to use 4 GB of virtual memory instead of being limited to 2 GB), but I got a bit further.īecause RDCMan is a pure. I don't think that should have an impact, but I wanted to be thorough. Also, I am just using the trial license for Server 2012 and Remote Desktop Services right now. Just to be clear, all these RDP sessions are running on the same server. I have seen reviews of RDCM with screenshots showing dozens of thumbnails so it seems to be something that's possible to do.Īre there any settings I should make on the server to allow RDCM to connect to more than 6 simultaneous RDP sessions? In fact, I will often have 30 or 40 RDP simultaneous sessions opened, I am just not able to view them all in RDCM. I have checked Group Policy on the server to ensure I don't have any settings restricting the number of RDP sessions. Sometimes the error says 3334, sometimes the error says 0x8345000E, and sometimes it just says there is a connection error.
If I activateĪ 7th session one of the existing 6 sessions goes off-line with a connection error message. If I add more sessions I just get a variety of connection errors for the additional sessions. I am only able to open, and view thumbnails, for a maximum of 6 RDP sessions on my Server 2012 box at a time in Remote Desktop Connection Manager (RDCM).
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