I've just tried to run another application to test the server. The best candidate was UServerConfig.exe - a configurator for the server. So, when I run it, the following messages are displayed: $ wine UServerConfig.exe fixme:ole:CoInitializeSecurity (0x671198,-1,(nil),(nil),4,3,(nil),0,(nil)) - stub! err:ole:CoGetClassObject class {88d969c1-f192-11d4-a65f-0040963251e5} not registered err:ole:CoGetClassObject class {88d969c1-f192-11d4-a65f-0040963251e5} not registered err:ole:create_server class {88d969c1-f192-11d4-a65f-0040963251e5} not registered fixme:ole:CoGetClassObject CLSCTX_REMOTE_SERVER not supported err:ole:CoGetClassObject no class object {88d969c1-f192-11d4-a65f-0040963251e5} could be created for context 0x17 err:ole:CoGetClassObject class {f5078f33-c551-11d3-89b9-0000f81fe221} not registered err:ole:CoGetClassObject class {f5078f33-c551-11d3-89b9-0000f81fe221} not registered err:ole:create_server class {f5078f33-c551-11d3-89b9-0000f81fe221} not registered fixme:ole:CoGetClassObject CLSCTX_REMOTE_SERVER not supported err:ole:CoGetClassObject no class object {f5078f33-c551-11d3-89b9-0000f81fe221} could be created for context 0x17 fixme:advapi:RegisterEventSourceW ((null),L"UMediaServer"): stub fixme:advapi:ReportEventW (0xcafe4242,0x0004,0x0000,0x00000000,(nil),0x0001,0x00000000,0x7e562a1c,(nil)): stub fixme:advapi:DeregisterEventSource (0xcafe4242) stub fixme:ole:CoResumeClassObjects stub fixme:quartz:NullRendererInner_QueryInterface No interface for {37d84f60-42cb-11ce-8135-00aa004bb851}! fixme:quartz:NullRendererInner_QueryInterface No interface for {37d84f60-42cb-11ce-8135-00aa004bb851}! As I suppose, UMediaServer gets started - wineserver starts to listen on its tcp port 5119. I was even able to connect to that port, it connects but drops the connection in a few seconds. The following message is displayed in wine session: fixme:dbghelp:SymGetModuleInfo Wrong size And that's all - wine stops responding, neither for ^C, nor in the application running in foreground (notepad or UServerConfig.exe). The connections are also not accepted anymore. The only way to stop wine is to kill it and all its processes. I've also tried native version of dbghelp.dll, it starts but also doesn't accept any connections: fixme:advapi:RegisterEventSourceW ((null),L"UMediaServer"): stub fixme:advapi:ReportEventW (0xcafe4242,0x0004,0x0000,0x00000000,(nil),0x0001,0x00000000,0x7e52f0a4,(nil)): stub fixme:advapi:DeregisterEventSource (0xcafe4242) stub wine: Unhandled page fault on read access to 0x00000000 at address (nil) (thread 0019), starting debugger... Unhandled exception: page fault on read access to 0x00000000 in 32-bit code (0x00000000). Register dump: CS:0073 SS:007b DS:007b ES:007b FS:0033 GS:003b ................. ................. Backtrace: =>1 0x00000000 in UMediaServer (+0xffc00000) (0x7e52f9e0) 2 0x00413a52 in UMediaServer (+0x13a52) (0x7e52fa28) 3 0x00413bcd in UMediaServer (+0x13bcd) (0x7e52fa60) 4 0x00413ef5 in UMediaServer (+0x13ef5) (0x7e52fab8) 5 0x7efc661e ZwCreateSemaphore+0xefe() in ntdll (0x7e52fac8) 6 0x7efc6cc2 RtlExitUserThread+0x72() in ntdll (0x7e52fb68) 7 0x7efc6edf RtlExitUserThread+0x28f() in ntdll (0x7e530458) 8 0xb7e7e240 (0x7e5304c8) 9 0xb7e1349e (0x00000000) fixme:advapi:RegisterEventSourceW ((null),L"UMediaServer"): stub fixme:advapi:ReportEventW (0xcafe4242,0x0004,0x0000,0x00000000,(nil),0x0001,0x00000000,0x7e52f0a4,(nil)): stub fixme:advapi:DeregisterEventSource (0xcafe4242) stub Any hopes anymore? Or these results are already too great for wine this time? Thank you all for your help!