Another Available Previous Version

Dorsey Pender

Getting the hang of it
Sep 7, 2019
188
22
San Francisco
What is the most recent version of BI in the list under Another Available Previous Version? The version I’m on does not appear in that list so I assume that it’s been pulled for being a bad train.
 
As of right now, the latest in the dropdown is 5.9.9.67. Then 5.9.9.59. Those are the only two in there from 2025.

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Blue Iris versioning is a bit of a mess. We can really only assume it follows the scheme of major.minor.build.revision or something, where incrementing an earlier (more significant) segment of the version number is supposed to indicate a more significant change.

For some reason it seems they locked themselves into a system where they can only have one digit in each of the segments except (obviously) the last segment. Over the years I've seen plenty of evidence of this. For example in BI update file names on their website at some point (maybe still today), BI omits the dots from the version number in the file name. So for example you might have "update64_59967.exe" or something like that. The only way you can read that and know it means "5.9.9.67" (as opposed to, for example, "5.9.96.7"), is by knowing ahead of time that the first 3 segments are exactly 1 digit long.

BI also has a relatively recent web API for triggering installation of an update remotely, and for reasons I cannot comprehend, he decided you can't just send in the version number the obvious way, instead it must be serialized into an 8-digit hexidecimal string that visually reads similarly to the version number and then it must be converted into a 32-bit decimal number. I can't make this stuff up. Its right here in the BI help file:

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That serialization system doesn't work if any of your version number segments are more than 2 digits long, which is one way you can be fairly certain Blue Iris 6 will be released before Blue Iris 5 reaches 5.9.9.100. Because 5.9.9.100 is impossible without breaking at least one of the rigid formatting rules they created for themselves.

Boy that tangent really went on for a while.

Anyway, I have no idea why he stopped leaving a version or two available from every month. I guess running out of digits in the first 3 segments must have really made it harder for them to keep track of which versions were perceived to be "stable".