Classic ASP : C0000005 Error on execution

Question

I\'m trying to execute classic ASP pages on a windows 2008 64 bit R2 box.

Initially the problem was with registering dlls : That\'s now fixed. Register DLL file on W

Answer 1

I had the same problem happen sometime after KB4093114 was installed on a server. (I'm not 100% sure that the KB caused the problem but I suspect so because the scripting engine was updated.)

The problem was caused by a recordset that output a varchar(max) field to the markup. Even though the error does not provide a line number, I was able to pinpoint it to the outputting of the varchar(max) field through trial and error.

<%
...
rs.Open "SELECT LongDescription FROM Table1"
while (not rs.EOF)
   %> 
<%= rs("LongDescription") %>
 <%    ' ERROR HAPPENS BECAUSE OF THIS LINE
   rs.MoveNext
wend
%>

Removing that line fixes the problem. Also, casting the field to a non-max varchar also fixes it:

 rs.Open "SELECT LongDescription = Cast(LongDescription as varchar(4000)) FROM Table1"

To make matters worse, I found that once the error happens, even if you fix it you need to recycle the app pool to make the error go away.