Bug #1065
A single tracker geometry module must use "PropertyInt Tracker 0"
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Description
There is an assumption in the tracker code somewhere that assumes that for a single tracker geometry module the tracker number should be 0. That is, "PropertyInt Tracker" should have a value of 0. Issue #1063 is an example of what can happen at the moment if this value is not 0. It's likely this would cause other problems once #1063 gets fixed.
Related issues
Updated by Heidt, Christopher over 11 years ago
This is by intention, not a bug. Tracker 0 is the forward facing tracker while Tracker 1 is the reverse. If you label a forward facing tracker as tracker 1 (and remove the part of the code that keeps you from doing this) then your x and y values will be reversed from the true positions.
Updated by Lane, Peter over 11 years ago
I'm not saying that you should eliminate the requirement that a single tracker module must use "Tracker 0". I'm disagreeing that if you don't do this that there is code that "keeps you from doing this". The Tracker parameter is not being checked for validity explicitly. It is being left up to other parts of the code to fail in ways that have no obvious relationship to the fact that an invalid parameter value was specified in the configuration.
In general, if there are constraints on configuration parameters that are beyond simply syntax (which is already checked for automatically in the data file parsing code), there ought to be additional validity checks in the code that understands how those parameters are used. If you don't do this then the software is unpredictable and very difficult to debug.
Updated by Rogers, Chris over 11 years ago
In general, if there are constraints on configuration parameters that are beyond simply syntax (which is already checked for automatically in the data file
parsing code), there ought to be additional validity checks in the code that understands how those parameters are used. If you don't do this then the software
is unpredictable and very difficult to debug.
Right - in general, if there is a problem the relevant error message should advise where to look to fix it.
Updated by Rogers, Chris about 11 years ago
Bump - is this closed? Just needs a bit more error checking I think.