[Typo3-shop] tt_prducts error message in Typo3.7

[Franz Holzinger]

Now I have found the solution to this:

I have remembered that I had copied the tt_products in the Extension 
Repository from the Typo3 website. But the tt_products was already 
available as a local extension, which had not been installed.
So the installed external extension from the Typo3 repository got in 
conflict with the not installed local extension.
Maybe this is an error in Typo3, because when someone downloads an 
external extension then I would expect that the local extensions are 
overwritten. This error will only happen in windows, because there is no 
symbolic link between typo3conf/ext and typo3/ext .

The solution now is to not install from the Typo3 repository but to copy 
the files manually to typo3/ext and install them afterwards.

Franz