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[Erw-devel] javascript error in IE

From: erw-devel
Subject: [Erw-devel] javascript error in IE
Date: Sun, 16 Nov 2003 14:38:35 +1100


A user of an ERW database has reported occaisonally seeing the following 
error message in IE6 when navigating back through a series of entity forms 
(see example below).   The server is running ERW 1.0.2, linux, apache, mysql, 

Line 2
Char 46
Error: The callee (server [not application]) is not available and 
disappeared; all connections are invalid. The call did not execute.
Code: 0
URL: ...../erw/update.php

The database design is based on the erl structure included below where 
entity type Two is a weak entity of One and entity type Three is a weak 
entity of Two.

- start at the main browse list for entity One & modify an existing element
- on the One form select an existing element in the Two list and modify it
- on the Two form select an existing element in the Three list and modify it
- modify an attribute in the Three form
- click Ok on the Three form to return to Two form
- click Ok on the Two form  to return to One form
- click Ok on the One form to return to One browse list

At some point in this clicking Ok again, and again, to navigate back through 
the forms the above mentioned IE error message occurs.  Although the user is 
working with the ERW forms over a dial-up internet connection it doesn't 
appear to be a broken connection because he is able to continue to navigate 
around the main lists and forms. There are plenty of threads regarding this 
IE error message when searching and many suggest it's a problem 
with window.opener usage.

I hope this points you in the right direction,

<ent id="one" label="One" owner="true">
    ... some attibutes...

<ent id="two" label="Two" owner="true">
    ... some attibutes...

<rel id="twoone">
        Identification function: Two - One
        <leg entref="two" label="One" lower="1" upper="1" key="true"/>
        <leg entref="one" label="Two" lower="0" upper="N"/>

<ent id="three" label="Three" owner="true">
    ... some attibutes...

<rel id="threetwo">
        Identification function: Three - Two
        <leg entref="three" label="Two" lower="1" upper="1" key="true"/>
        <leg entref="two" label="Three" lower="0" upper="N"/>

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