DOCUMENT:Q257625 13-MAY-2002 [iis] TITLE :Err Msg: HTTP: 500-100, Internal Server Error - ASP Error... PRODUCT :Internet Information Server PROD/VER:winnt:5.0 OPER/SYS: KEYWORDS:kbOSWin2000 kbiis500prod2web kbhttp500100 kbProd2Web ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Internet Information Services version 5.0 ------------------------------------------------------------------------------- SYMPTOMS ======== When you attempt to browse an ASP Web page, the following error messages are displayed in the browser: The page cannot be displayed There is a problem with the page you are trying to reach and it cannot be displayed. HTTP 500.100 - Internal Server Error - ASP error Internet Information Services In addition, information similar to the following is displayed under the "Technical Information (for support personnel)" section: Error Type: Microsoft VBScript runtime (0x800A01F4) Variable is undefined: 'x' /OptionExplicitError.asp, line 9 Page: GET /OptionExplicitError.asp CAUSE ===== When you use Visual Basic, Scripting Edition, the Option Explicit statement is specified in the script of the ASP file. Subsequently, the script attempts to use an undeclared variable. RESOLUTION ========== Too resolve this issue, either remove the Option Explicit statement or declare the variable (using the DIM keyword). MORE INFORMATION ================ Steps to Reproduce Behavior --------------------------- To reproduce this behavior, run an ASP file that contains the following code (in a virtual directory that permits script execution): <% Option Explicit %> 500-100 Undeclared Variable

About to use an undeclared variable

<% x = 5 %>

To fix the example above, declare the X variable using the DIM statement, which is demonstrated as follows: <% Option Explicit %> 500-100 Undeclared Variable

About to use an undeclared variable

<% DIM x x = 5 %>

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