<html><head></head><body><div style="font-family: Verdana;font-size: 12.0px;"><div>Hi again!</div>
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<div>Thanks to Karin. The problem is, that I don't know why I get this error message.</div>
<div>I have used the ncl script from the ncl website to calculate the POPs for the mean sea level pressure.</div>
<div>I am using NCEP reanalysis data. The mean sea level pressure has the dimensions time, lat, lon.</div>
<div>So, following the ncl script it should be 2D before calculating the inverse matrix.</div>
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<div>You can find attached my ncl script.</div>
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<div>Thanks,</div>
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<div>Lena</div></div></body></html>