Microsoft KB Archive/163700

= IIS Access Violation for Polygon with More Than 100 Vertices =

Article ID: 163700

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Internet Information Server 2.0
 * Microsoft Internet Information Server 3.0

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This article was previously published under Q163700





SYMPTOMS
Internet Information Server (IIS) may experience an access violation when it processes client response coordinates for a server side Image Map. The access violation will occur if the region selected is a Polygon with more than 100 vertices defined.



CAUSE
IIS defines enough space to store 100 vertices for a polygon region; therefore, if more than 100 vertices exist in the image map, IIS attempts to process the additional vertices. An access violation then occurs when the limit of 100 vertices is exceeded.



RESOLUTION
IIS has been modified to allow 160 vertices and ignore any polygon region defined with more than 160 vertices.



STATUS
Microsoft has confirmed this to be a problem in Microsoft Internet Information Server versions 2.0 and 3.0. This problem was corrected in the latest Microsoft Windows NT 4.0 U.S. Service Pack. For information on obtaining the service pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

  S E R V P A C K

Additional query words: prodnt access violation iis

Keywords: kbbug kbnetwork KB163700

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