Dear Akinyoola Julius,<div><br></div><div>Ensure that you have the GMTED_DEM_30s.nc file at the location &#39;<br><span style="color:rgb(34,34,34);font-size:14px">/mnt/lustre/users/jakinyoola/</span><wbr style="color:rgb(34,34,34)"><span style="color:rgb(34,34,34);font-size:14px">regcm/run/REGCM_GLOBEDAT/</span><wbr style="color:rgb(34,34,34)"><span style="color:rgb(34,34,34);font-size:14px">SURFACE/&#39; as specified in the error message.</span></div><div><font color="#222222"><span style="font-size:14px"><br></span></font></div><div><font color="#222222"><span style="font-size:14px">If it isn&#39;t there then download it into that location. However if you have the file in a different location then change the location in your namelist.</span></font></div><div><font color="#222222"><span style="font-size:14px"><br></span></font></div><div><font color="#222222"><span style="font-size:14px">Regards,</span></font></div><div><font color="#222222"><span style="font-size:14px"><br></span></font></div><div><font color="#222222"><span style="font-size:14px">Peter Nunekpeku.<br></span></font>On Monday, August 8, 2022,  &lt;<a href="mailto:regcnet-request@lists.ictp.it">regcnet-request@lists.ictp.it</a>&gt; wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
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Today&#39;s Topics:<br>
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   1. NetCDF: Unknown file format (Akinyoola Julius)<br>
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From: Akinyoola Julius &lt;<a href="mailto:omoakinyoola@gmail.com">omoakinyoola@gmail.com</a>&gt;<br>
Subject: [RegCNET] NetCDF: Unknown file format<br>
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Dear all,<br>
I was trying to test run RegCM4 with <a href="http://test_01.in" target="_blank">test_01.in</a> but got this error flag<br>
Opening<br>
/mnt/lustre/users/jakinyoola/<wbr>regcm/run/REGCM_GLOBEDAT/<wbr>SURFACE/GMTED_DEM_30s.nc<br>
 NetCDF: Unknown file format<br>
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 mod_rdldtr.F90 :      141:NetCDF Error:          -51<br>
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Program aborted. Backtrace:<br>
#0  0x422f9a in ???<br>
#1  0x4470c9 in ???<br>
#2  0x410c27 in ???<br>
#3  0x417c13 in ???<br>
#4  0x402b98 in ???<br>
#5  0x2aaaabca3b34 in ???<br>
#6  0x402bc8 in ???<br>
#7  0xffffffffffffffff in ???<br>
Aborted<br>
[jakinyoola@login2 run]$<br>
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I would like to know what to do correctly<br>
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with kind regards<br>
Julius<br>
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