If you're not combining license files from different vendors, the simplest thing to do is make sure you use the tools (especially lmgrd) that are shipped by each vendor.
lmgrd will always correctly support older versions of vendor daemons and applications, so it's ALWAYS safe to use the latest version of lmgrd. If you've combined license files from 2 vendors, you MUST use the latest version of lmgrd.
If you've received 2 versions of a product from the same vendor, you MUST use the latest vendor daemon they send you. An older vendor daemon with a newer client will cause communication errors.
Please ignore letters appended to FLEXlm versions, i.e., v2.4d. The appended letter indicates a patch, and does NOT indicate any compatibility differences. In particular, some elements of FLEXlm didn't require certain patches, so a 2.4 lmgrd can work successfully with a 2.4b vendor daemon.
Yes. Older FLEXlm license files are always valid with newer versions of FLEXlm.
As of v3.0, FLEXlm has an optional new format for license files, which is explained fully in
Q3.1. FLEXlm products always understand older versions; therefore, the pre-v3.0 files are
understood by every FLEXlm version. However, your old applications (pre-FLEXlm v3.0) will
not be able to use the new license file.
This is a short, incomplete summary of the features introduced with each FLEXlm version. Each
version had minor security, convenience and reliability enhancements, which are not listed.
v1.0 1988, First FLEXlm Release
v1.5 February, 1990, First widely-used version, containing all the basic FLEXlm features,
including:
v2.1 March, 1991
v2.21 November 1991
v2.26 March 1992 - Released only to Sun
v2.4 December 1992 - Currently (Summer 1995) the most commonly used version.
v2.61 March 1993 - Released only to Sun
v3.0 May 1994
v4.0 December 1994
v4.1May 1995
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Q4.2 I've received a new copy of a product from a vendor, and it uses a new version of FLEXlm. Is my old license file still valid?
Q4.3 I've received a new license file, and the format is different from the old one I had from the same vendor? Why? Are they compatible?
Q4.4 How do versions of FLEXlm differ?