I found the solution: trying to connect via SimConnect failed because in Options --> FS Connection --> Parameters the value for Server Port/Pipe was "0" and not empty. Now Plan-G seems to work well. THX.

Hi, for me it is impossible to connect Plan-G with FSX. my computer has Win7-64-bit OS, FSX is running on E:\ and plan-G is installes in D:\Plan-G\ directory. When FSUIPC is enabled, Plan-G tries to connect with FSX, the right location is loading on the screen but then Plan-G freezes. A connect via simconnect seems impossible.

Here the log-file from Plan-G:

Quote11:16:32.7
11:16:32.7 ---===+++===---
11:16:32.7 Starting Plan-G, build 2.0.5.493
11:16:32.7 OS is Microsoft Windows NT 6.1.7601 Service Pack 1
11:16:33.1 Location is D:\Plan_G
11:16:33.3 Window_Loaded
11:16:33.3 SetInitialControlStates
11:16:33.3 Checking DEM availability
11:16:33.3 FSX is installed
11:16:33.3 Checking FSX database built status
11:16:33.3 IsDataLoaded: True
11:16:33.3 Data Source = D:\Plan_G\Data\PlanG_FSX.sdf
11:16:33.4 Checking FS9 database built status
11:16:33.4 IsDataLoaded: False
11:16:33.4 Data Source = D:\Plan_G\Data\PlanG_FS9.sdf
11:16:33.4 Setting ribbon group
11:16:33.4 Setting db button states
11:16:33.4 Selected data set is FSX
11:16:33.5 SetInitialControlStates done
11:16:33.5 SetTheme Blue
11:16:33.6 Checking Internet available
11:16:34.0 Setting MRU
11:16:34.0 Checking command line
11:16:34.0 Command line. Length = 1 args = D:\Plan_G\PlanG.exe,
11:16:34.0 Opening map
11:16:34.1 Starting timers
11:16:34.1 Window_Loaded done
11:16:34.4 DEBUG: Aircraft
11:16:34.4 Clear all Airspace. (ClearAirspaceBoundaries)
11:16:34.5 =====>> PlotOverlayElements. N = 49,6818468994013 s = 46,4567814281266 w = -127,413940429688 e = -118,438110351563 Zoom = 8
11:16:34.5 =====>> PlotOverlayElements. N = 49,6818468994013 s = 46,4567814281266 w = -127,413940429688 e = -118,438110351563 Zoom = 8
11:16:34.5 --> Zoom Still
11:16:34.5 DrawFlightPlan. MoveMap = False nodes = 0
11:16:34.5 No plan - erasing line
11:16:34.6 PlotOverlayElements - starting plot
11:16:34.6 Airspace
11:16:34.6 GetAirspaceInBounds retrieved 0 boundaries
11:16:34.6 NDBs
11:16:34.7 VORs
11:16:34.7 Airports
11:16:35.0 GetAirportsInBounds retrieved 0 airports.
11:16:35.0 ISECs
11:16:35.0 UWpts
11:16:35.0 done
11:16:35.0 DrawFlightPlan. MoveMap = False nodes = 0
11:16:35.0 No plan - erasing line
11:16:44.1 WxTimer_Tick
11:16:44.1 Checking for updates
11:16:44.1 DownloadCurrentMetars thread started
11:16:44.1 Autoconnect to FS.
11:16:44.1 RibbonButton_Click_ConnectFS
11:16:44.1 Metar08Z.TXT started
11:16:44.1 lTAF06Z.TXT started
11:16:44.1 sTAF06Z.TXT started
11:16:44.1 sTAF00Z.TXT started
11:16:44.1 FSUIPC.Connect
11:16:44.1 Metar09Z.TXT started
11:16:44.1 lTAF00Z.TXT started
11:16:44.3 FSUIPCAI: 1476 0kts include = True
11:16:44.3 DEBUG: Building encoded trail
11:16:44.6 sTAF06Z.TXT done
11:16:45.3 PlotAIAircraft: 1 acft. includeStationary = True plotTrail = False
11:16:45.3 FSUIPCAI: 1474 0kts include = True
11:16:45.9 =====>> PlotOverlayElements. N = 49,6818468994013 s = 46,4567814281266 w = -127,413940429688 e = -118,438110351563 Zoom = 8
11:16:45.9 PlotOverlayElements - starting plot
11:16:45.9 Airspace
11:16:45.9 GetAirspaceInBounds retrieved 0 boundaries
11:16:45.9 NDBs
11:16:45.9 VORs
11:16:45.9 Airports
11:16:46.0 GetAirportsInBounds retrieved 0 airports.
11:16:46.0 ISECs
11:16:46.0 UWpts
11:16:46.0 done
11:16:46.1 PlotAIAircraft: 2 acft. includeStationary = True plotTrail = False
11:16:46.1 FSUIPCAI: 1478 0kts include = True
11:16:46.3 lTAF06Z.TXT done
11:16:46.6 sTAF00Z.TXT done
11:16:46.7 PlotAIAircraft: 3 acft. includeStationary = True plotTrail = False
11:16:46.7 FSUIPCAI: 1640 131kts include = True
11:16:46.8 lTAF00Z.TXT done

And the Win7 error log:

QuoteName der fehlerhaften Anwendung: PlanG.exe, Version: 2.0.5.493, Zeitstempel: 0x4d836f53
Name des fehlerhaften Moduls: KERNELBASE.dll, Version: 6.1.7601.17651, Zeitstempel: 0x4e211319
Ausnahmecode: 0xe0434352
Fehleroffset: 0x0000b9bc
ID des fehlerhaften Prozesses: 0x20c
Startzeit der fehlerhaften Anwendung: 0x01cd46208f6d17fb
Pfad der fehlerhaften Anwendung: D:\Plan_G\PlanG.exe
Pfad des fehlerhaften Moduls: C:\Windows\syswow64\KERNELBASE.dll
Berichtskennung: d633b1f2-b213-11e1-92e3-bcaec5762e84

Hope you have an idea, how Plan-G can work for me. Btw: FS-Map is working without any problem.