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--- exercises:2016_uzh_cmest:faq [2016/12/05 11:51] – [How do I build a slab model for a surface?] scaravati
+++ exercises:2016_uzh_cmest:faq [2020/08/21 10:15] (current) – external edit 127.0.0.1
@@ Line 14: / Line 14: @@
 <code>
-mpirun -n 8 cp2k.popt -i yourinput.inp -o youroutput.out
+$ mpirun -n 8 cp2k.popt -i yourinput.inp -o youroutput.out
 </code>
@@ Line 39: / Line 39: @@
 The basic usage to obtain a charge density difference is:
 <code>
-$PATH/cubecruncher.x -i input.cube -o output.cube -subtract subsystem.cube
+$ /users/scaravat/bin/cubecruncher.x -i input.cube -o output.cube -subtract subsystem.cube
 </code>
@@ Line 49: / Line 49: @@
 Vesta comes preinstalled on ''tcopt3'', provided that you load the proper module.
 <code>
-module load vesta
+$ module load vesta
 </code>
@@ Line 69: / Line 69: @@
 <note tip>Your calculation should be set up in such a way that forces are being calculated:
 e.g. ''RUN_TYPE'' set to ''GEO_OPT'' or ''ENERGY_FORCE''; instead ''RUN_TYPE ENERGY'' won't work!</note>
+===== My calculation does not converge =====
+==== ... and I use MULTIPLE_UNIT_CELL ====
+  * first make sure that you actually need ''MULTIPLE_UNIT_CELL''. In case you want to do band structure calculation, you most definitely do **not** want it
+  * if you are sure that you need it, make sure that it is specified two times: once in the [[https://manual.cp2k.org/trunk/CP2K_INPUT/FORCE_EVAL/SUBSYS/CELL.html#MULTIPLE_UNIT_CELL|''CELL'' section]] and a second time in the [[https://manual.cp2k.org/trunk/CP2K_INPUT/FORCE_EVAL/SUBSYS/TOPOLOGY.html#desc_MULTIPLE_UNIT_CELL|''TOPOLOGY'' section]], otherwise your calculation may or may not converge