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Hi Sampath That message should never appear during refinement; the popup is called from the autoindexing code in iMosflm, and once that process is completed successfully there is no way the code can call it - so there's obviously something very odd happening. Indexing appears to have succeeded (i.e. you have the choice of the orthorhombic cell), so there must be more to this than meets the eye. Which version of iMosflm are you using? Is it one in the CCP4 suite or one that you have downloaded from the official Mosflm site? > Dear All, > > I have the problem in processing the data with imosflm. The data was > collected with 2.5A resolution about 300 images. Auto index found the > space > group P222 with unit cell a= 40.2; b= 79.2; c= 194.7 and á=b=ã = 90.0. For > this cell, the penalty is 7. I feel this penalty is good enough to select > the cell based from the list. When I start to refine the cell, the new > popup > window is opening with some suggestions as below. > > "The index process has failed. It might be worthwhile trying again with" > > 1. A larger or smaller largest cell edge > > 2. Using more or fewer reflections (200-1000 is best) > > 3. Using more and / or different images > > 4. Checking your direct beam position carefully > > > > Could anyone help me to solve these problems? > > Thanks, > > Sincerely > > Sampath N >