[ncl-talk] Joining large files using "cat" option

[amit timilsina]

Respected Mary,

Thank you very much. I tried to many files using "cat" option. I got error like "File too large: error attempting to write variable (pr) to file (pr_day_CMCC-CM_rcp45_r1i1p1_20060101-20351231.nc)". It seems that there is a limitation on a number of files and files sizes. Is there any way to solve this problem? Thank you very much for your time.


ncl 2> f=addfiles(fils,"r")

ncl 3> ListSetType(f,"cat")

ncl 4> pr=f[:]->pr

ncl 5> ncdf=addfile("pr_day_CMCC-CM_rcp45_r1i1p1_20060101-20351231.nc","c")

ncl 6> filedimdef(ncdf,"time",-1,True)

ncl 7> ncdf->pr=pr

fatal:File too large: error attempting to write variable (pr) to file (pr_day_CMCC-CM_rcp45_r1i1p1_20060101-20351231.nc)

fatal:["Execute.c":8573]:Execute: Error occurred at or near line 7




Amit Prasad Timilsina
PhD student
School of Natural Resources,UNL
243 Hardin Hall
3310 Holdrege Street
Lincoln, Nebraska


________________________________
From: Mary Haley <haley at ucar.edu>
Sent: Monday, November 30, 2015 11:22 AM
To: amit timilsina
Cc: ncl-talk at ucar.edu
Subject: Re: [ncl-talk] Error in joining files having

Amit,

The error is telling you that your coordinate variable is non-monotonic.  In order to use "cat" mode to join a dimension, which is usually the time dimension, the time values must be monotonic. Also, I believe the time arrays must have the same units.

Please look at your "time" dimension on both files and make sure 1) they are monotonic, 2) they have the same units, and 3) the first time value of the second file is greater than the last time value of the first file.

--Mary




On Fri, Nov 27, 2015 at 4:23 PM, amit timilsina <timilsinaamit87 at huskers.unl.edu<mailto:timilsinaamit87 at huskers.unl.edu>> wrote:
Respected all,

Is the warning " warning:error attempting to fix non-monotonic aggregation variable"  while joining files makes any differences? The first file has dimension size: 366x240X480 and second file have 365x240x480 or first-year data is leap year data. Even with using both non-leap year data, I found the similar problem. What is the reason for getting this problem and how can I solve it?

ncl 0> fils = (/"pr_day_CMCC-CM_decadal2005_r1i2p1_20120101-20121231.nc","pr_day_CMCC-CM_decadal2005_r1i2p1_20130101-20131231.nc"/)ncl 1> f=addfiles(fils,"r")
ncl 2> ListSetType(f,"cat")
ncl 3> pr=f[:]->pr
warning:error attempting to fix non-monotonic aggregation variable


Thank you in advance.

Amit Prasad Timilsina
PhD student
School of Natural Resources,UNL
243 Hardin Hall
3310 Holdrege Street
Lincoln, Nebraska
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