Interchange 500 error

[rego]

Interchange is giving 500 error page when trying to click admin interface/user interface from cpanel for some accounts. The same accounts gave the following error in /scripts/upcp:

Calling UI......UI is loaded...
Interchange V4.8.3
Configuring catalog user1...Using default DBM database...Alias /~user1/cgi-bin/cart.cgi used a second time, skipping.
done.
Configuring catalog user2...Using default DBM database...Alias /~user2/cgi-bin/cart.cgi used a second time, skipping.
done.
Interchange server started in INET and UNIX mode(s) (process id 32060)

I've tried /scripts/rebuildinterchangecfg+restart, /scripts/fixinterchange, but no result.

Can someone guide me if there is any way to rectify without deleting the cart?

 

[awsol]

Look in interchange.cfg and sometimes there are lines where the cart is loaded twice. Make sure there are no duplicate lines for any domains. This can happen if a user clicks the cart option twice which will activate it 2 times.

 

[rego]

Thanks awsol.

I tried, but this doesn't solve the problem. The 500 error says &Premature end of script headers in /home/user/public_html/cgi-bin/cart.cgi& in the error log.

Some other domains work fine without errors.

Edit: Problem sorted out - there was a permissions problem.