Latest Contributions by TomCohen

I can't figure out which is the best sub-forum for this question (why are there so many?), and I suspect I might be the only person in the whole world attempting to do this, but here goes... I had an application based on the .NET Web ADF originally built in 9.3. The server is being upgraded to 10.1 so the application needs to move with it (re-architecting is not an option). The automated upgrade utility was not the smoothest process and I have since fixed a couple of very obvious bugs in the ESRI JavaScript. However there is one problem I can't figure out: Intermittently, after a full page reload, the map fails to render. The application calls ESRI.ArcGIS.ADF.Web.UI.WebControls.MapHandler.ashx requesting a URL for the new map image. Sometimes that handler returns {"code":400,"type":"error","errorMessage":"Resource <service name> not found"} The application then requests an image from ESRI.ArcGIS.ADF.Web.MimeImage.ashx passing an ImgID parameter that seems to be randomly made-up - I can't see it in any previous requests and it obviously isn't provided by MapHandler.ashx. The server then responds with a 404. If I reload the application again the same requests are sent with exactly the same parameters (in the example I saw the post-reload request even passed the same 't' parameter which I assume should represent time) and a successful response is returned. Can anyone tell me why my service is reported as unavailable? ArcGIS Server is not logging any errors or warnings. ... View more

I have several map services running on the same server / AGS instance and one of them, which sources all its data from File GeoDatabases (which are registered folders on the server) periodically logs the following message in AGS (tagged SEVERE). Method failed.HRESULT = 0x80070057 : The parameter is incorrect The service is configured to always draw data dynamically, and has never been configured to create / use a tile cache. However, it also periodically logs Failed to rename cache folder This message is also tagged SEVERE. There doesn't seem to be any issue rendering data, and rendering time is good, so I have no idea if this is a problem or not. Any suggestions on what's going on here would be much appreciated. ... View more

I've just moved to version 3.2 of the JavaScript API and implemented an IdentifyTask with an error callback. I'm using Fiddler to trap requests to my map server, then manually changing their response code from 200 to 500, 401 etc - anything that should be seen as an error by my application. The problem is the error callback is never called in response to these error responses. I know the 500 response gets to the browser because it gets logged as an error in Chrome's console. Instead the error callback is called some time later after a Dojo 'timeout' error. It seems real error responses are being ignored and the only error handling is for timeouts. Is this a bug in the API or am I doing / expecting something incorrect? What I'm doing in code is very straightforward (see below) and I'm using Fiddler's BPU (breakpoint on URL) to catch identify requests, then clicking 'break on completion', and changing the header "HTTP/1.1 200 OK" to "HTTP/1.1 500 Internal Server Error". This is the same approach I've used many times before to simulate server errors. identifyTask.execute(identifyParameters, lang.hitch(this, this.onIdentifyResults), lang.hitch(this, this.onIdentifyError)); The contents of the error callback is irrelevant as I'm sticking a breakpoint on the first line and waiting for it to be hit. Thanks! ... View more

I have posted a very similar message in the GeoServer forums as this is as much a GeoServer problem as ArcGIS. I'm hoping someone here has experience connecting ArcMap to a GeoServer WFS. I am connecting ArcGIS (v10, SP3) to a GeoServer (2.1.3) WFS through its Data Interoperability Extension. The extension is unlicensed, but a license isn't required for basic WFS data retrieval. The DIE has two ways of retrieving data - simple GML features and WFS. Simple GML will always cache the data (24 hours?) but WFS gives the option of always getting live data from GeoServer - this is what I need. I set up the connection and added a GeoServer WFS resource to the ArcMap table of contents, but when I open the attribute table every single attribute is listed as null. I did some digging and found that ArcMap is making a GetFeature request for every visible row in the attribute table and is using the Filter structure in request parameters. Filters look like this: <ogc:Filter><ogc:PropertyIsEqualTo><ogc:PropertyName>local:ID</ogc:PropertyName><ogc:Literal>149</ogc:Literal></ogc:PropertyIsEqualTo></ogc:Filter> GeoServer errors with a parsing exception - it doesn't understand the ogc: prefix because "The prefix "ogc" for element "ogc:Filter" is not bound". If I send the same request but without the ogc: prefix the response is as expected. So to see live GeoServer WFS data in ArcMap I need to either 1) configure ArcMap to not use the ogc: prefix on Filter, or 2) configure GeoServer to not complain when the ogc: prefix is provided. Given that ArcMap and GeoServer are both quite common I was hoping this issue had come up before, but so far I've found nothing. Any suggestions are very welcome. ... View more

I have described my problem in greater detail on my favourite forum here but I think this could be a tricky one so I'm kind of cross-posting here in case the 1 person in the world who knows the answer doesn't see my other post. I have feature classes registered with a class extension and I handle the OnCreate event whenever a feature is created. However, using the Advanced Editing / Copy Features tool the event is not fired and I can't figure out why. Any suggestions? Thanks very much. ... View more

I have an ArcMap add-in which is updating fields for a collection of line features within a loop. After updating values for these fields I call the Store() function of the IFeature-implementing feature (each store is correctly contained within IWorkspaceEdit.StartEditOperation and StopEditOperation, and the loop within StartEditing and StopEditing). The same features (so far I know of 2, in a sample of more than 10,000) will regularly cause the Store() function to return "Error HRESULT E_FAIL has been returned from a call to a COM component." with no indication why. I can't see anything obviously different between successful features and failing features (i.e. unusual geometry values, special characters in attributes) so I'm stumped as to what's causing this. If I swallow the error and carry on the add-in continues to function as expected until the next failing feature is encountered. The features can have a relationship to an annotation feature class, but by the first fail roughly half of the processed features do have a relationship and the others don't, so I can't say it's related to this association. I currently get the source data from a personal geodatabase (.mdb) but the same problem occurs in the SDE system the features were exported from. When I received it the mdb required upgrading to the v10 format, but I got the same behaviour before and after this upgrade. Can anyone suggest any reasons why this error might be occurring on only *some* of my features, and if there is any way to find out more about the error? I find COM exceptions the single most frustrating aspect of my day job. ... View more