[quote author=Zoi link=topic=2526.msg5920#msg5920 date=1437138318]
Dear all,
.. but I cannot run it because I get error that the [b]buffer is empty [/b] and [b]error while executing simulation[/b] ..
[/quote]
Difficult to say based on the log file you provided, because it contains a lot of extra information from previous attempts.
When sending the WEST log file, [b]is always best to first [u]clear[/u] the Logging pane and then execute the action that may cause the error[/b]. In this way, the log file will only contain essential information.
Anyway, in your case it seems to be due to the influent file (incorrect format, missing rows - probably the first one at time zero, ..) or influent specs.
How do you provide the influent characterisation? do you use one file? multiple files that are to be merged by WEST?
Do you modify the list of "components" (i.e. measurements) in the General page of the Influent Tool - and the default fractionation model?
[quote author=Zoi link=topic=2526.msg5920#msg5920 date=1437138318]
.. which of the two fractionation type (custom or standard) is best to use and which information should the input files should include[/quote]
There's no best way to do it: it depends on what type of influent specs you can provide.
Generally, one does not measure all the ASM- components (cf Standard) but a certain set of conventional, lumped, quantities (e.g. COD, TSS, ..).
As to which information should the influent specs include: it does not really matter, as long as, based on your limited set of measured quantities, you can provide all the state components of the selected category/instance (in your case, ASM2).
So you could use flow rate, COD, BOD, TSS, T(K)N, TP; or flow rate, COD, BOD, TSS, NHx, NOx, PO4, TP; or .. any combination [b]as long as you can "map" all the ASM2 components[/b].