I wanted to use product_custom_attributes Module and found it on launchpad bundled with about 30 different modules here https://launchpad.net/openerp-product-attributes
downloaded them all by lp:openerp-product-attributes from inside of my /opt/openerp/ocb7.0 folder and added /opt/openerp/ocb7.0/openerp-product-attribtues in my 'addons path' in out /etc/ocb-7.0.conf file

this works fine and I can install all these modules.

But actually I have now about 7 folders for modules inside of our /opt/openerp/ocb7.0 folder. I though that is a little too much and would like to clean that up. Actually my idea was to do the downloading (maybe not the quite correct term) from github or launchpad into my home folder and then only copy the modules I want to use into the regular 'addons' folder. In order to do the cleanup I tried:

1. sudo service ocbserver-7,0 stop   (not sure whether that is really necessary)
2. copied the two modules (base_custom_attributes & product_custom_attributes) into the 'ocb-addons' folder
3. did a   chown -R openerp:openerp   ocb-addons (to make them accesible)
4. moved the folder 'openerp-product-attributes' into my /home
5. deleted the /opt/openerp/ocb7.0/openerp-product-attribtues from the 'addons path' in my config file
6. restarted the ocb-server
7. updated my Modules list

as a result I can't open my products any more with the following error:

View error

Can't find field 'categ_ids' in the following view parts composing the view of object model 'product.product':
* product.normal.form

Either you wrongly customized this view, or some modules bringing those views are not compatible with your current data model

un- and reinstalling the two modules does not help

any idea how to fix this? I did the same procedure described above sucessfully with another module (which is a custom made module that adds an extra field for an employee)