| Detailed description |
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In AbstractTool.cpp (line 562) and in DynamicsTool.cpp (line 230); OpenSim 3.1, (most up to date OpenSim31 branch as of this bug report, 28 July 2013):
An issue exists when, in a setup file for ANY tool (ID, RRA, CMC), the external_loads file is NOT in the same directory as the setup file. For example, there is an issue when the value of external_loads_file is ../external_loads.xml.
The issue is that we are unable to find the external_loads.xml file, when it is indeed located in ../external_loads.xml.
Here is the reason:
The current working directory (cwd) is changed to the dir containing external_loads_file BEFORE ExternalLoads() is deserialized. Therefore, we can't even deserialized ExternalLoads() because we're now looking for it relative to external_loads_file, instead of relative to the initial setup file. In the example above, we chdir to '../', and then look for '../external_loads.xml', meaning the actual file has to be at '../../external_loads.xml'. Then, of course, the paths in the file will be parsed incorrectly.
Fixing this bug would be great, because it would allow a great reduction in file duplication when running multiple simulations/tools.
The fix should be simple: move the chDir() call to AFTER the ExternalLoads() try-catch block. |
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