John, please open an issue on https://github.com/mapserver/mapserver/issues It will help greatly if you could attach a small test case so that we can reproduce the issue and track the cause.
Thanks, Umberto On Wed, Dec 5, 2012 at 12:34 AM, Huotari, John B (RCIS) < [email protected]> wrote: > I’m using C Sharp MapScript to access MapServer (MS4W 3.0.6). I’m > creating a new mapObj from an almost empty MAPFILE and then dynamically add > layers to the map and then calling draw to generate an image. I’m also > dynamically adding symbolObjs to the map’s symbolset for the layers to > reference. This all works great the vast majority of the time, but on rare > occasions, sometime after the map has been generated, I receive the > following AccessViolationException when garbage collection is attempting to > clean up the MapServer objects.**** > > ** ** > > System.AccessViolationException was unhandled**** > > Message=Attempted to read or write protected memory. This is often an > indication that other memory is corrupt.**** > > Source=mapscript_csharp**** > > StackTrace:**** > > at OSGeo.MapServer.mapscriptPINVOKE.delete_symbolObj(HandleRef > jarg1)**** > > at OSGeo.MapServer.symbolObj.Dispose()**** > > at OSGeo.MapServer.symbolObj.Finalize()**** > > InnerException:**** > > ** ** > > ** ** > > I’ve tried disposing of the map itself, its symbolset, as well as each > symbolObj item in that symbolset by calling Dispose on each, but doing so > neither causes the error to happen immediately upon calling Dispose > (instead it still only happens when garbage collection runs) nor does it do > anything to resolve the issue. I don’t see any reference to symbolObj in > the map layers (looks like it just holds a symbol name and/or index) nor > anywhere else that stands out as a logical place to look, so I don’t see > anything else to dispose. Does anyone have any idea of where I could look > for any symbolObjs which have been allocated so I can dispose of them so > that garbage collection does not choke when attempting to dispose of them > for me? Am I barking up the wrong tree and should be looking somewhere > else entirely rather than focusing on symbolObj?**** > > ** ** > > Thanks for any guidance that can be provided,**** > > John**** > > _______________________________________________ > mapserver-users mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/mapserver-users > >
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