Hakan, ok, the older .dll works (sort of - see below), the newer one does not. Let me give you some further background. Earlier this year, I
lost radar pics below about 1nm. Kees had a similar problem, and it was a fault in the radar, so after trying various .dll versions, I decided I must have the same fault, as no-one else had reported it. Being a bit low on cash at the moment, I decided I had to put up with it for a while.
Then, in August or Sept, another user commented to me that he had had a similar issue, and it was resolved by a newer .dll. So I looked on GIT, and downloaded the latest (remember, Sept at this point). It worked! I had all ranges again, and I thought "fixed!, something in the .dll..."
Then, I noticed the latest one had come out - changed to that. No radar image AT ALL... Changed back to the Sept one, worked. No other changes. Tried it on my netbook - same results exactly. So I decided to format and
rebuild my nav PC to see if it was some other
software app conflict, or a windows problem causing the issue. I formatted, and rebuilt windows (7, ent, SP1) loaded OCPN and
charts, Still no radar Pic. Stupidly I had formatted the machine with the Sept .dll on it - the only one that worked properly!

It does not seem to be
hardware - changing the .dll's gives repeatably no radar image at all with ver .41026 and an image with range over 1nm with .40622. There is nothing obvious in the log files;
.41026
________
10:33:00: 2014-10-30
10:33:00: ------- Starting
OpenCPN -------
10:33:00: Version 3.3.2222 Build 2014-10-22
10:33:00: wxWidgets version: wxWidgets 2.8.12
10:33:00: MemoryStatus: mem_total: 3501 mb, mem_initial: 8 mb
10:33:00: SData_Locn is C:\Program Files\OpenCPN\
10:33:00: Using existing Config_File: C:\ProgramData\opencpn\opencpn.ini
10:33:00: Styles loading from C:\Program Files\OpenCPN\uidata\styles.xml
10:33:00: No styles found at: C:\ProgramData\opencpn\
10:33:00: No styles found at: C:\ProgramData\opencpn\.opencpn\
10:33:00: Setting Viewpoint Lat/Lon -36.6162, 174.788
10:33:00: Setting Ownship Lat/Lon -36.6162, 174.788
10:33:00: System default Language: en_US
10:33:00 AM:
Opencpn language set to: en_US
10:33:04 AM: ChartSymbols loaded from C:\Program Files\OpenCPN\s57data\chartsymbols.xml
10:33:04 AM: Using s57data in C:\Program Files\OpenCPN\s57data
10:33:04 AM: Setting Viewpoint Lat/Lon -36.6162, 174.788
10:33:04 AM: Setting Ownship Lat/Lon -36.6162, 174.788
10:33:04 AM: Opening
NMEA Datastream
Serial:COM3
10:33:04 AM: Opening
NMEA Datastream
Serial:COM5
10:33:04 AM: Opening NMEA Datastream Serial:COM6
10:33:04 AM: Creating glChartCanvas
10:33:04 AM: PlugInManager searching for PlugIns in location C:\Program Files\OpenCPN\plugins
10:33:04 AM: PlugInManager: Loading PlugIn: C:\Program Files\OpenCPN\plugins\br24radar_pi.dll
10:33:04 AM: C:\Program Files\OpenCPN\plugins\br24radar_pi.dll
API Version detected: 108
PlugIn Version detected: 41012
10:33:04 AM: PlugInManager: Loading PlugIn: C:\Program Files\OpenCPN\plugins\dashboard_pi.dll
10:33:04 AM: C:\Program Files\OpenCPN\plugins\dashboard_pi.dll
API Version detected: 106
PlugIn Version detected: 102
10:33:04 AM: Warning: unable to use NPOT texture for chart symbols
10:33:04 AM: OpenGL-> Renderer String: Intel(R) HD Graphics
10:33:04 AM: OpenGL-> Detected Intel renderer, disabling stencil buffer
10:33:04 AM: OpenGL-> Texture rectangle format: de1
10:33:04 AM: OpenGL-> Detected Windows Intel renderer, disabling Vertexbuffer Objects
10:33:04 AM: OpenGL-> Vertexbuffer Objects unavailable
10:33:04 AM: OpenGL-> Using Framebuffer Objects
10:33:04 AM: OpenGL-> Using FBO Stencil buffer
10:33:04 AM: OpenGL-> Using
Depth buffer clipping
10:33:04 AM: OpenGL-> Using s3tc dxt1
compression
10:33:04 AM: OpenGL-> Compressed tile size: 128kb (6:1)
10:33:04 AM: OpenGL-> Minimum cartographic line width: 1.0
10:33:04 AM: OpenGL-> Minimum symbol line width: 1.0
10:33:04 AM: ChartDB Cache policy: Application target is 1024 MBytes
10:33:04 AM: Loading chart db version: V018
10:33:04 AM: Chartdb: Chart directory list follows
10:33:04 AM: Chart directory #0: C:\nzcharts
10:33:04 AM:
GPS Watchdog Timeout is: 6 sec.
10:33:04 AM: Initializing Chart C:\nzcharts\NZ21\NZ2101.KAP
10:33:05 AM: Changing NMEA Datasource for IIHDG to Serial:COM6 (Priority: 1)
10:33:05 AM: Changing NMEA Datasource for IIDPT to Serial:COM6 (Priority: 1)
10:33:06 AM: Changing NMEA Datasource for GPRMC to Serial:COM5 (Priority: 1)
10:33:06 AM: Changing NMEA Datasource for IIMTW to Serial:COM6 (Priority: 1)
10:33:06 AM: BR24radar_pi: Heading source is now HDT
10:33:06 AM: Changing NMEA Datasource for IIMWV to Serial:COM6 (Priority: 1)
10:33:06 AM: Changing NMEA Datasource for IIDBT to Serial:COM6 (Priority: 1)
10:33:06 AM: Changing NMEA Datasource for IIVLW to Serial:COM6 (Priority: 1)
10:33:06 AM: Changing NMEA Datasource for IIVHW to Serial:COM6 (Priority: 1)
10:33:06 AM: Changing NMEA Datasource for AIVDO to Serial:COM3 (Priority: 3)
10:33:07 AM: Changing NMEA Datasource for GPRMC to Serial:COM3 (Priority: 3)
10:33:07 AM: Initializing Chart C:\nzcharts\NZ22\NZ2201.KAP
10:33:12 AM: Changing NMEA Datasource for IIRMC to Serial:COM6 (Priority: 1)
10:33:12 AM: Changing NMEA Datasource for IIRMA to Serial:COM6 (Priority: 1)
10:33:13 AM: Changing NMEA Datasource for IIRSA to Serial:COM6 (Priority: 1)
10:33:14 AM: BR24radar_pi: Range Change: 0 --> 22309 meters (raw value: 3155
10:33:29 AM: PlugInManager: Deactivating PlugIn: C:\Program Files\OpenCPN\plugins\br24radar_pi.dll
10:33:29 AM: PlugInManager: Deactivating PlugIn: C:\Program Files\OpenCPN\plugins\dashboard_pi.dll
10:33:29 AM: opencpn::MyFrame exiting cleanly.
10:33:29 AM: Closing NMEA Datastream Serial:COM3
10:33:29 AM: Stopping Secondary Thread
10:33:30 AM: Stopped in 1 sec.
10:33:30 AM: Closing NMEA Datastream Serial:COM5
10:33:30 AM: Stopping Secondary Thread
10:33:31 AM: Stopped in 1 sec.
10:33:31 AM: Closing NMEA Datastream Serial:COM6
10:33:31 AM: Stopping Secondary Thread
10:33:32 AM: Stopped in 1 sec.
10:33:32 AM: Chart cache purge
10:33:32 AM: PlugInManager: UnLoading PlugIn: C:\Program Files\OpenCPN\plugins\br24radar_pi.dll
10:33:32 AM: PlugInManager: UnLoading PlugIn: C:\Program Files\OpenCPN\plugins\dashboard_pi.dll
10:33:32 AM: Chart cache purge
10:33:32 AM: LOGBOOK: 2014-10-29 21:33:32 UTC OFF: Lat -36.61618 Lon 174.78828 COG 231.00000 SOG 0.00 kts
10:33:32 AM: opencpn::MyApp exiting cleanly...
and .40622
________
11:01:04: 2014-10-30
11:01:04: ------- Starting OpenCPN -------
11:01:04: Version 3.3.2222 Build 2014-10-22
11:01:04: wxWidgets version: wxWidgets 2.8.12
11:01:04: MemoryStatus: mem_total: 3501 mb, mem_initial: 8 mb
11:01:04: SData_Locn is C:\Program Files\OpenCPN\
11:01:04: Using existing Config_File: C:\ProgramData\opencpn\opencpn.ini
11:01:04: Styles loading from C:\Program Files\OpenCPN\uidata\styles.xml
11:01:04: No styles found at: C:\ProgramData\opencpn\
11:01:04: No styles found at: C:\ProgramData\opencpn\.opencpn\
11:01:04: Setting Viewpoint Lat/Lon -36.6162, 174.788
11:01:04: Setting Ownship Lat/Lon -36.6161, 174.788
11:01:04: System default Language: en_US
11:01:04 AM: Opencpn language set to: en_US
11:01:08 AM: ChartSymbols loaded from C:\Program Files\OpenCPN\s57data\chartsymbols.xml
11:01:08 AM: Using s57data in C:\Program Files\OpenCPN\s57data
11:01:08 AM: Setting Viewpoint Lat/Lon -36.6162, 174.788
11:01:08 AM: Setting Ownship Lat/Lon -36.6161, 174.788
11:01:08 AM: Opening NMEA Datastream Serial:COM3
11:01:08 AM: Opening NMEA Datastream Serial:COM5
11:01:08 AM: Opening NMEA Datastream Serial:COM6
11:01:08 AM: Creating glChartCanvas
11:01:08 AM: PlugInManager searching for PlugIns in location C:\Program Files\OpenCPN\plugins
11:01:08 AM: PlugInManager: Loading PlugIn: C:\Program Files\OpenCPN\plugins\br24radar_pi.dll
11:01:08 AM: C:\Program Files\OpenCPN\plugins\br24radar_pi.dll
API Version detected: 108
PlugIn Version detected: 40622
11:01:08 AM: PlugInManager: Loading PlugIn: C:\Program Files\OpenCPN\plugins\dashboard_pi.dll
11:01:08 AM: C:\Program Files\OpenCPN\plugins\dashboard_pi.dll
API Version detected: 106
PlugIn Version detected: 102
11:01:08 AM: Warning: unable to use NPOT texture for chart symbols
11:01:09 AM: OpenGL-> Renderer String: Intel(R) HD Graphics
11:01:09 AM: OpenGL-> Detected Intel renderer, disabling stencil buffer
11:01:09 AM: OpenGL-> Texture rectangle format: de1
11:01:09 AM: OpenGL-> Detected Windows Intel renderer, disabling Vertexbuffer Objects
11:01:09 AM: OpenGL-> Vertexbuffer Objects unavailable
11:01:09 AM: OpenGL-> Framebuffer Incomplete: 00008CDD
11:01:09 AM: OpenGL-> Framebuffer Objects unavailable
11:01:09 AM: OpenGL-> Using
Depth buffer clipping
11:01:09 AM: OpenGL-> Using s3tc dxt1
compression
11:01:09 AM: OpenGL-> Compressed tile size: 128kb (6:1)
11:01:09 AM: OpenGL-> Minimum cartographic line width: 1.0
11:01:09 AM: OpenGL-> Minimum symbol line width: 1.0
11:01:09 AM: ChartDB Cache policy: Application target is 1024 MBytes
11:01:09 AM: Loading chart db version: V018
11:01:09 AM: Chartdb: Chart directory list follows
11:01:09 AM: Chart directory #0: C:\nzcharts
11:01:09 AM: GPS Watchdog Timeout is: 6 sec.
11:01:09 AM: Initializing Chart C:\nzcharts\NZ5321\NZ532101.KAP
11:01:09 AM: Warning: Skew override on chart C:\nzcharts\NZ5321\NZ532101.KAP is 0.00119747 degrees
11:01:10 AM: Changing NMEA Datasource for IIMTW to Serial:COM6 (Priority: 1)
11:01:10 AM: Changing NMEA Datasource for IIMWV to Serial:COM6 (Priority: 1)
11:01:10 AM: Changing NMEA Datasource for IIDBT to Serial:COM6 (Priority: 1)
11:01:10 AM: Changing NMEA Datasource for GPRMC to Serial:COM5 (Priority: 1)
11:01:10 AM: Changing NMEA Datasource for IIVLW to Serial:COM6 (Priority: 1)
11:01:10 AM: Changing NMEA Datasource for IIVHW to Serial:COM6 (Priority: 1)
11:01:10 AM: Changing NMEA Datasource for IIHDG to Serial:COM6 (Priority: 1)
11:01:10 AM: Changing NMEA Datasource for IIDPT to Serial:COM6 (Priority: 1)
11:01:11 AM: Changing NMEA Datasource for IIRMC to Serial:COM6 (Priority: 1)
11:01:11 AM: Changing NMEA Datasource for IIRMA to Serial:COM6 (Priority: 1)
11:01:11 AM: BR24radar_pi: Heading source is now HDT
11:01:11 AM: Changing NMEA Datasource for AIVDO to Serial:COM3 (Priority: 3)
11:01:11 AM: Changing NMEA Datasource for GPRMC to Serial:COM3 (Priority: 3)
11:01:15 AM: BR24radar_pi: Range Change: 0 --> 1852 meters (raw value: 262
11:01:27 AM: BR24radar_pi: Range Change: 1852 --> 1393 meters (raw value: 197
11:01:33 AM: BR24radar_pi: Range Change: 1393 --> 1852 meters (raw value: 262
11:01:45 AM: PlugInManager: Deactivating PlugIn: C:\Program Files\OpenCPN\plugins\br24radar_pi.dll
11:01:45 AM: PlugInManager: Deactivating PlugIn: C:\Program Files\OpenCPN\plugins\dashboard_pi.dll
11:01:45 AM: opencpn::MyFrame exiting cleanly.
11:01:45 AM: Closing NMEA Datastream Serial:COM3
11:01:45 AM: Stopping Secondary Thread
11:01:46 AM: Stopped in 1 sec.
11:01:46 AM: Closing NMEA Datastream Serial:COM5
11:01:46 AM: Stopping Secondary Thread
11:01:47 AM: Stopped in 1 sec.
11:01:47 AM: Closing NMEA Datastream Serial:COM6
11:01:47 AM: Stopping Secondary Thread
11:01:48 AM: Stopped in 1 sec.
11:01:48 AM: Chart cache purge
11:01:48 AM: PlugInManager: UnLoading PlugIn: C:\Program Files\OpenCPN\plugins\br24radar_pi.dll
11:01:48 AM: PlugInManager: UnLoading PlugIn: C:\Program Files\OpenCPN\plugins\dashboard_pi.dll
11:01:48 AM: Chart cache purge
11:01:48 AM: LOGBOOK: 2014-10-29 22:01:48 UTC OFF: Lat -36.61615 Lon 174.78826 COG 0.00000 SOG 0.00 kts
11:01:48 AM: opencpn::MyApp exiting cleanly...
Sorry for the long post. Any ideas??
Matt