PHP Fatal error: Call to a member function MoveNext() on a non-object in

Hi, I am having a major issue that has just started and I have no idea why or how.

Server Details:
PHP Version 5.3.8
Zen Cart 1.5.0
Database Patch Level: 1.5.0
Server OS: Linux 2.6.18-274.12.1.el5
Database: MySQL 5.1.61-log
HTTP Server: Apache
PHP Version: 5.3.8 (Zend: 2.3.0)
PHP Memory Limit: 64M
PHP Safe Mode: Off
PHP File Uploads: On
Max Size: 32M
POST Max Size: 32M

Addons:
EP4

The test website I am building has stopped displaying everything that is below the header. This started immediately after I did a bulk upload of product images via Filezilla.

My debug folder shows the following:
[29-Mar-2012 15:19:26] PHP Fatal error: Call to a member function MoveNext() on a non-object in /includes/classes/category_tree.php on line 68

I have taken a back up of now and compared it with a back up taken last week and there are no changes. I have removed all of the images I uploaded but this has not resolved the matter. Reverting back to the Classic template also does not fix the problem.

I don't know why this is happening, or how to fix it.
Please Help!

Any ideas anyone? I resolved the issue by rolling back the database and files from an earlier backup. But why it happens still alludes me. Or what caused it to happen.

I have consulted with my hosting company who are fairly Zen Cart savvy, but even they cannot explain why it happened. Thankfully it is test website, not a live site. But if it happens to a live site I truly would not know what to do.

Had the same experience a couple of days ago - also using Zc 1.5

My error message reads:

Fatal error: Call to a member function MoveNext() on a non-object in /home/XXXXXXXXXX/public_html/includes/classes/category_tree.php on line 68

It is caused by:

Creating a TOP LEVEL category, with the default PRODUCT TYPE (ie: Product General)

Then, you create a SUB CATEGORY in it, but then configure that SUB category to be specific to a DIFFERENT Product type.

It would seem that the SUB category cannot be configured to hold different product types than a parent category.

However, if you create a sub category and maintain the PRODUCT TYPE of the parent, there is a feature (at ADD PRODUCT level) where you can select the product type (for that individual product).

Thanks for the report.

Will test, and see if I can figure out the problem and solution :)

k, so far I'm not able to reproduce this.

I created a top level category,
Then restricted that category to Products - General (also tried without any restriction)
created a sub category within that.
then restricted that sub-category to Product - Music
no errors
tried creating a product within the Product - Music sub category - still no errors

Can you provide a more detailed step by step, to produce the error

Quote:

---

Originally Posted by wilt

k, so far I'm not able to reproduce this.

I created a top level category,
Then restricted that category to Products - General (also tried without any restriction)
created a sub category within that.
then restricted that sub-category to Product - Music
no errors
tried creating a product within the Product - Music sub category - still no errors

Can you provide a more detailed step by step, to produce the error

---

We set up ver 1.5 (full manual installation) and applied the all_business template by Picaflor Azul, making sure to apply her 1.5 version of the template.

Site hosted at TerraNetwork.net (zencart and eComm specialists in the UK)

Have installed a few mods:

Image handler 4
Easy Populate 4
Apsona ShopAdmin
Magictoolbox Image Zoom effects
Google Analytics
XMLSitemaps

We created various top-level categories - all at PRODUCT_GENERAL.

We added SUB-CATEGORIES to some of the top level categories, and then added PRODUCTS to these sub-categories.

After creating sub-categories and putting products into those categories (all product_general products), we created another sub-category along-side those other sub-categories, (now populated with products), and we changed that sub-category - still empty - to product type DOCUMENT_GENERAL, specifying that any subcategories BENEATH it must also be DOCUMENT_GENERAL.

This is when we received the error as shown above.

When the page loads, it gives us the header, but no columns or footer, and in the area where the columns would be, is the error message. This is identical to the error logged in the cache folder.

Could it be that once sub-categories (at the same LEVEL) are populated with products, creating a NEW sub-category and trying to change its product type, will throw that error?