VIRTUALCHANNELINIT returns CHANNEL_RC_NOT_IN_VIRTUALCHANNELENTRY error

Question

Our&nbsp;application&nbsp;uses&nbsp;Remote&nbsp;Desktop&nbsp;Services&nbsp;virtual&nbsp;channels.&nbsp;The&nbsp;first&nbsp;time&nbsp;user&nbsp;connects&nbsp;to&nbsp;remote&nbsp;machine&nbsp;using&nbsp;Remote&nbsp;Desktop&nbsp;app&nbsp;(msrdcw.exe&nbsp;that&nbsp;starts&nbsp;msrdc.exe&nbsp;process&nbsp;when&nbsp;connection&nbsp;is&nbsp;initiated)&nbsp;everything&nbsp;works&nbsp;as&nbsp;expected.&nbsp;After&nbsp;logging&nbsp;off&nbsp;and&nbsp;then&nbsp;re-connecting&nbsp;to&nbsp;the&nbsp;same&nbsp;target&nbsp;machine&nbsp;VIRTUALCHANNELINIT&nbsp;callback&nbsp;function&nbsp;returns&nbsp;CHANNEL_RC_NOT_IN_VIRTUALCHANNELENTRY&nbsp;(15)&nbsp;error.&nbsp;Everything&nbsp;works&nbsp;fine&nbsp;if&nbsp;the&nbsp;same&nbsp;is&nbsp;done&nbsp;with&nbsp;Remote&nbsp;Desktop&nbsp;Connection&nbsp;(mstsc.exe).&nbsp;Call&nbsp;to&nbsp;VIRTUALCHANNELINIT&nbsp;is&nbsp;done&nbsp;from&nbsp;within&nbsp;VirtualChannelEntry&nbsp;function&nbsp;in&nbsp;all&nbsp;cases&nbsp;(otherwise&nbsp;it&nbsp;would&nbsp;not&nbsp;work&nbsp;the&nbsp;first&nbsp;time,&nbsp;I&nbsp;guess).&nbsp;Apparently&nbsp;the&nbsp;difference&nbsp;between&nbsp;Remote&nbsp;Desktop&nbsp;Connection&nbsp;and&nbsp;Remote&nbsp;Desktop&nbsp;apps&nbsp;is&nbsp;that&nbsp;when&nbsp;disconnecting&nbsp;from&nbsp;session&nbsp;the&nbsp;former&nbsp;terminates&nbsp;both&nbsp;Virtual&nbsp;Channel&nbsp;and&nbsp;mstsc.exe&nbsp;process&nbsp;but&nbsp;the&nbsp;latter&nbsp;only&nbsp;terminates&nbsp;Virtual&nbsp;Channel&nbsp;but&nbsp;leaves&nbsp;msrdc.exe&nbsp;process&nbsp;running.&nbsp;So&nbsp;one&nbsp;found&nbsp;workaround&nbsp;is&nbsp;to&nbsp;stop&nbsp;msrdc.exe&nbsp;process&nbsp;by&nbsp;clicking&nbsp;"Disconnect&nbsp;all&nbsp;sessions"&nbsp;in&nbsp;the&nbsp;notification&nbsp;area&nbsp;menu.&nbsp;After&nbsp;that&nbsp;the&nbsp;next&nbsp;connection&nbsp;from&nbsp;Virtual&nbsp;Desktop&nbsp;initialises&nbsp;Virtual&nbsp;Channel&nbsp;successfully.&nbsp;Additionally&nbsp;if&nbsp;we&nbsp;modify&nbsp;our&nbsp;dll&nbsp;so&nbsp;that&nbsp;VirtualChannelOpen&nbsp;is&nbsp;not&nbsp;called,&nbsp;then&nbsp;every&nbsp;call&nbsp;to&nbsp;VirtualChannelInit&nbsp;succeeds.&nbsp;So&nbsp;the&nbsp;question&nbsp;is&nbsp;why&nbsp;does&nbsp;VIRTUALCHANNELINIT&nbsp;callback&nbsp;function&nbsp;succeeds&nbsp;the&nbsp;first&nbsp;time&nbsp;but&nbsp;returns&nbsp;CHANNEL_RC_NOT_IN_VIRTUALCHANNELENTRY&nbsp;error&nbsp;on&nbsp;any&nbsp;subsequent&nbsp;re-connection&nbsp;when&nbsp;used&nbsp;with&nbsp;Remote&nbsp;Desktop&nbsp;(msrdcw.exe)&nbsp;but&nbsp;succeeds&nbsp;every&nbsp;time&nbsp;when&nbsp;used&nbsp;with&nbsp;Remote&nbsp;Desktop&nbsp;Connection&nbsp;(mstsc.exe)?

nicojasy · Answer

Can you please tell us if there are any updates, possible solutions to this problem? In 2023 I'm getting the error still.

soo kuan teo · Answer

Thanks for reporting. This is a known issue, we are working on the fix.

robot1que · Answer

Soo Kuan Teo&nbsp;do you know, by any chance, when approximately this will be resolved?

soo kuan teo · Answer

Thank you for your patience, the bug is currently in the normal queue to be fixed. If you like, please do open a support case, provide us more details, recommend the support to escalate the case to WVD team, and also put in the case the link to the TEchcommunity conversation.

guyrleech · Answer

Is there any update on this please as I'm getting this with msrdc (WVD) 1.2.1954.0? If I kill the msrdc.exe process from the previous session then it works fine but that's not ideal.

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VIRTUALCHANNELINIT returns CHANNEL_RC_NOT_IN_VIRTUALCHANNELENTRY error

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