shoufengwei

Maybe no, the file in same position.Can I transfor my file to you?

[test.zip](https://github.com/Unidata/netcdf4-python/files/3271949/test.zip)

 works well in shell mode.  Can't work in django.

@jswhit I had checked both `Dataset` and `MFDataset`,It's all show the same error.

Thanks, I'll have a try.

I'd try set the dir's permission to 777: `chmod -R 777 /my/dir/path`. And I found that the 'ubyte.nc' and some other's which you provide can work well,but other's can't.

I found that when you call the method b with _refresh,you must not use the position parameter name.

I'm sorry,it's my mistake.

Now the question is that,When I want to clear the cache,I must call the method with `_refresh=True` without positional arg name,like this: ``` self.b('', None, _refresh=True) ``` if call this...

And how can I clear a function's cache by all args?Like function b's arg1 equals 1,2,3,4,and so on, and arg2 equals '1', '2', and so on. Since you had said...