Dear Sirs, On September the 30-th i sent you the following email: Dear Sirs. We have installed the Alliance v3.0 package on a Pentium PC with 32 MB RAM, with a Linux OS. We are currently trying to build a system that uses three levels of hierarchy, with the top level being a 2-input 4-bit wide comparator, the next level a bit slice comparator and the low level gates from the /scr library of Alliance. This comparator is used as a component in a circuit that acts as a processing element in an array that puts in order numbers. When trying to place and route the processing element structural description in VHDL, with the scr tool, the process of placement seems to be alright, but the tool stops during routing, and edits the following message: . . . Loading SCR data base... scr_error: Overlaping of cells <cell where <cell is an instance of a gate used in the structural description of the comparator. Note that the <cell is different each time we run the scr tool with a different -i specification. What is wrong? What does the above message mean? No such message is mentioned in the "diagnostics" section of the man scr pages. Looking forward to your reply, Sincerely yours, Eleas Malamas,Postgraduate st., Electronis Lab., Technical University of Crete. I am more than certain that you have already replied to the above message, but i have had some troubles with my email server lately, so i would be obliged if you sent the reply once more. Thank you in advance, Eleas Malamas.