Migration Guide for Allegro Platform Products
Core Allegro Platform Back-End Products
October 2019 71 Product Version 17.4-2019
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■ Binaries have moved to /tools/bin from
/tools/pcb/bin. Paths in scripts must be updated.
■ If you run batch programs using the cmd.exe or .bat files, a batch file,
allegro_cmd.bat, is provided in the hierarchy (\tools\bin) to update the PATH variable. Modify your batch file to include
\tools\bin\allegro_cmd.bat.
Files
There are changes for the following:
■ Downrev
■ Database
■ Techfiles
■ Binaries
Downrev
■ Files saved in 17.4, such as .brd,.mcm,.sip, and .pad cannot be downreved to 16.x
versions.
■ You can no longer uprev pre-16.0 techfiles that have a.tech file extension.
Database
■ Allegro database has migrated to 64-bit.
■ Working memory size has increased from 4GB to 18,446,744,073,709,551,616 (18
quintillion).
■ Maximum database size has increased from 400MB to 3GB on Windows, and from
600MB to 3GB on Linux.
■ 400 potential new user subclasses are possible with the addition of Rigid-Flex and
Surface classes.
■ Windows Vista and XP are no longer supported.
Techfiles
■ Legacy Technology Files (.tech) are not compatible with 17.4.
