SmartSDR Unable to Start

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  • Updated 3 weeks ago
I have a Win 10 Pro 64 problem that I have not been able to mend.  I have not used my 6300 for a couple of months. So updated to V2.6.1.  However, cannot get it to load.  I can see my 6300 in all three programs, but it says no stations are online.  On my portable machine all loads OK. 

Checked in Windows Admin Event Viewer logs and it says SmartSDR failed due to "faulting module path c:\windows\system32\ntdll.dll   So I presumed ntdll.dll is corrupt perhaps.  

Tried to mend with sfc /scannow and nothing wrong followed by  DISM /Online /Cleanup-Image /RestoreHealth  Also tried in Safe mode.  No joy.  Tried to copy ntdll.dll from another source, but as this is a windows core file unable to do so.

Downloaded to USB key new copy of windows and did install of latest windows leaving apps and files.  I thought this would do the trick!

No, still no joy.  Each time by the way I have uninstalled SmartSDR and reinstalled just to make sure.

I really don't want to have to do a clean install of windows.  Anyone got any ideas please?   
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Andy F5VAI

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Posted 6 months ago

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Bill -VA3WTB

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It sounds like a connection problem. Is there any fire wall? Anti anything running?
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Andy F5VAI

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No I have checked that. 
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Please try "Method #2" from Microsoft Community to fix the problem.

the method is to type (in an admin cmd window):

regsvr32.exe /u ntdll.dll
regsvr32.exe     ntdll.dll

GL // k3Tim
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Andy F5VAI

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Hi Tim,

Thanks for idea. I had tried that, but it would not work. However, on reading MS info you cannot register ntdll.dll. I am running out of ideas!  Also it is a red herring. 

I think I am going to have to submit a ticket to Flex.  
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marco rinaldi

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Hey Andy Did you sort out the issue? I have a similar problem smart sdr randomly is not able to see my flex shitting down pc and radio and restart from zero (sometimes) works.
It’s completely random so I’m not able to fix it.

Tks ciao
Photo of Ted  VE3TRQ


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I would definitely examine your network. The most common cause of these issues is intermittent switches or cables. Next to that, and could be somewhat related, is an inability of your radio to get an IP address (DHCP is usually the default).