[ferret_users] * unknown netCDF error code: -1

[Xiufeng Yang <xf.yang87@xxxxxxxxx>]

Dear Ferreters,

I was running the following script, and got the error message shown in the subject. Following is a very short script, and you can very conveniently repeat it in your own machine in one minute.

yes? USE "http://tds.hycom.org/thredds/dodsC/glb_analysis"
yes? show data
 name     title                             I         J         K         L
U         u-veloc. [60.5H]                1:4500    1:3298    1:33      1:2736
V         v-veloc. [60.5H]                1:4500    1:3298    1:33      1:2736

yes? save/file=test.nc U[I=2548:2780,J=1909:2160,L=14]
 ** unknown netCDF error code:  -1

However, when L is specified values other than 14, I didn't get any error message. 
I was wondering if any Ferreter has any experience on this issue. Any kind of help will be appreciated.

Thanks,
X.Y.