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    <title>topic Re: Internet Explorer/Firefox and map services in ArcGIS API for Silverlight Questions</title>
    <link>https://community.esri.com/t5/arcgis-api-for-silverlight-questions/internet-explorer-firefox-and-map-services/m-p/195525#M4841</link>
    <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;Where you able to narrow down which part of your code was throwing unhandled exception?&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;You may want to subscribe to each layer's InitializationFailed event. This blog post might help you determine the root of this issue: &lt;/SPAN&gt;&lt;A href="http://blogs.esri.com/Dev/blogs/silverlightwpf/archive/2009/08/24/Troubleshooting-blank-layers.aspx"&gt;http://blogs.esri.com/Dev/blogs/silverlightwpf/archive/2009/08/24/Troubleshooting-blank-layers.aspx&lt;/A&gt;&lt;SPAN&gt;. As to why it works in FireFox and not in IE, I have no idea. But if you could pin point the problem code, please share it with us so we can test it out.&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;Thanks!&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
    <pubDate>Thu, 21 Apr 2011 18:41:01 GMT</pubDate>
    <dc:creator>JenniferNery</dc:creator>
    <dc:date>2011-04-21T18:41:01Z</dc:date>
    <item>
      <title>Internet Explorer/Firefox and map services</title>
      <link>https://community.esri.com/t5/arcgis-api-for-silverlight-questions/internet-explorer-firefox-and-map-services/m-p/195524#M4840</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;hi all, I created new map services for my application but kept getting an error when I tested my app in VS 2010.&amp;nbsp; It was a "Webpage Error":&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;Error: Unhandled Error in Silverlight Application Code: 4004&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Category:&amp;nbsp; ManagementRuntimeError&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Message: Error code 400: Service 'SAM_NoTopo' of type 'MapServer' does not exist or is inaccessible.&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;Couldn't imagine the problem (service was there in Server Manager and I could access its REST page).&amp;nbsp; Finally out of desperation I changed my default browser in VS from Internet Explorer to Firefox and it worked just fine.&amp;nbsp; Retested a bunch of times with both browsers and that's the fact, these particular map services test fine in Firefox, not in IE.&amp;nbsp; Then again others test fine in both Firefox and IE...&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;So apparently this is an Internet Explorer issue.&amp;nbsp; I was just wondering if anyone else has experienced this and why this is happening. Thanks!&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Thu, 21 Apr 2011 17:18:56 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcgis-api-for-silverlight-questions/internet-explorer-firefox-and-map-services/m-p/195524#M4840</guid>
      <dc:creator>DanielSchatt</dc:creator>
      <dc:date>2011-04-21T17:18:56Z</dc:date>
    </item>
    <item>
      <title>Re: Internet Explorer/Firefox and map services</title>
      <link>https://community.esri.com/t5/arcgis-api-for-silverlight-questions/internet-explorer-firefox-and-map-services/m-p/195525#M4841</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;Where you able to narrow down which part of your code was throwing unhandled exception?&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;You may want to subscribe to each layer's InitializationFailed event. This blog post might help you determine the root of this issue: &lt;/SPAN&gt;&lt;A href="http://blogs.esri.com/Dev/blogs/silverlightwpf/archive/2009/08/24/Troubleshooting-blank-layers.aspx"&gt;http://blogs.esri.com/Dev/blogs/silverlightwpf/archive/2009/08/24/Troubleshooting-blank-layers.aspx&lt;/A&gt;&lt;SPAN&gt;. As to why it works in FireFox and not in IE, I have no idea. But if you could pin point the problem code, please share it with us so we can test it out.&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;Thanks!&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Thu, 21 Apr 2011 18:41:01 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcgis-api-for-silverlight-questions/internet-explorer-firefox-and-map-services/m-p/195525#M4841</guid>
      <dc:creator>JenniferNery</dc:creator>
      <dc:date>2011-04-21T18:41:01Z</dc:date>
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