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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
Hi,I am creating netCDF4-classic files from scratch using the netcdf4-python library. I'm frequently hitting an assertion failure:
nc4hdf.c:90: rec_detach_scales: Assertion `grp && grp->name && dimid >= 0 && dimscaleid >= 0' failed.
Looking at the source code for netcdf 4.0.1, the comments for the function rec_detach_scales seem to suggest that this function should only be called in rare cases. This leads me to believe I'm doing things in a bad order:
1. Define all global attributes (CF conventions, author etc..) 2. Define all dimensions (time/lat/lon)3. Define the dimension variables corresponding to time/lat/lon (eg writing all the metadata for each dimension)
4. Define a particular variable (flags) for data to be stored in 5. Define another metadata variable (for the map projection) 6. Define a whole set of variables to store data in 7. Insert the data for latitude/longitude 8. Insert the data for the flags variable 9. Insert the time data 10. Insert the data for each of the variables from (6) So I have 2 questions: 1. Is the assertion failure a bug, or because of something I'm doing wrong?2. What is the best order for setting up the file? Eg should the coordinate data be inserted immediately after defining the coordinate variables and dimensions?
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