CMS Made Simple Forums

I have a working base template and 3 extended child templates.
These work on one site/server.

When migrating (and not having access to my usual tools) I find that something won't fly.
It works on the front end. Templates are nicely extended.

On the backend I can edit the base template and child templates as well.

When I want to assign a base template to a page, all goes well.

But when I want to assign a child template to a page, the editing page goes white when tryin to load the child template.

When I bulk switch to to child template, it is assigned (shows in front end) but editing the content page is impossible (white)

I tried emptying cache, rename template, copy/paste. I feel the extending is not working in backend? Or do I need a clear/flush?

When I remove the additional content blocks in the child template it works (minus the content block off course)

Any idea how to proceed?


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Cms Version: 1.11.13
Installed Modules:
CMSMailer: 5.2.2
CMSPrinting: 1.0.5
FileManager: 1.4.5
MenuManager: 1.8.6
MicroTiny: 1.2.9
ModuleManager: 1.5.8
News: 2.15
Search: 1.7.12
ThemeManager: 1.1.8
CGExtensions: 1.45
CGSimpleSmarty: 1.7.4
CGSmartImage: 1.17.2
FrontEndUsers: 1.26
CustomContent: 1.10
CGContentUtils: 1.5
ListIt2XDefs: 1.2
ListIt2: 1.4.1
ListIt2XLink: 1.01
GBFilePicker: 1.3.3
ListIt2NewsV2: 1.4.1
ListIt2Slider: 1.4.1
ListIt2Teasers: 1.4.1
ListIt2Company: 1.4.1
FormBuilder: 0.8.1.1

Config Information:
php_memory_limit:
process_whole_template:
max_upload_size: 20000000
url_rewriting: mod_rewrite
page_extension:
query_var: page
image_manipulation_prog: GD
auto_alias_content: true
locale:
default_encoding: utf-8
admin_encoding: utf-8
set_names: true

Php Information:
phpversion: 5.4.26
md5_function: On (True)
gd_version: 2
tempnam_function: On (True)
magic_quotes_runtime: Off (False)
E_STRICT: 2048
E_DEPRECATED: 8192
memory_limit: 496M
max_execution_time: 30
output_buffering: On
safe_mode: Off (False)
file_uploads: On (True)
post_max_size: 8M
upload_max_filesize: 20M
session_save_path: No check because open basedir active
session_use_cookies: On (True)
xml_function: On (True)
xmlreader_class: On (True)

Server Information:
Server Api: apache2handler
Server Db Type: MySQL (mysqli)
Server Db Version: 5.1.73
Server Db Grants: Found a "GRANT ALL" statement that appears to be suitable
Server Time Diff: No filesystem time difference found

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Guess...

Forgot my UDT "get_page_dir"

{content_module module='GBFilePicker' block='main_image_01' mode='browser' assign='main_image_01' label='Main Image_01' dir=':::get_page_dir dir="images/pages" page=$page_alias:::' smarty="true" tab='Images'}
{content_module module='GBFilePicker' block='main_image_02' mode='browser' assign='main_image_02' label='Main Image_02' dir=':::get_page_dir dir="images/pages" page=$page_alias:::' smarty="true" tab='Images'}