Recent posts

#1

News and updates / PetThermoTools online workshop...

Last post by asimow - December 18, 2025, 10:17:47 AM

We will be hosting a free online workshop January 12-13, 2026, to introduce a new python package called PetThermoTools that can be used to run thermodynamic calculations in rhyoliteMELTS, pMELTS, and MAGEMin (Holland models) in Python, getting around a lot of the stability issues of MELTS in particular and providing speed improvements through the use of parallel processing.

It can do mantle melting, fractional or equilibrium crystallization, phase diagrams, degassing and much more. Feel free to share this announcement broadly as well as signing up yourself!

Sign up link is here.

A preprint announcing and describing the new software is here:
PetThermoTools: a fast, flexible, and accessible Python3 package for performing thermodynamic calculations

Read the Docs examples with linked YouTube videos are here:
Welcome to PetThermoTools's documentation! — PetThermoTools v.0 documentation

Happy to also hear any issues you and your group may have trying to run stuff!

#2

The MELTS family of algorithms, and scientific discussion / Re: column-pick can not transf...

Last post by Paula - December 11, 2025, 01:14:13 PM

Hi Kai,

The output from column-pick.command is a comma- or text-delimited text file that can be easily imported into Excel. It is not an actual Excel file. If you take the ">aaa.xlsx" off what you are typing then you will be able to see the output of column-pick.command, including any error messages.

The input to column-pick.command is mostly a list of files, tables, and columns. For example:

Code Select Expand

Name: col_custom.txt
Header: Excel
Format: csv              ! output a comma-delimited table that can be opened in Excel automatically by double-clicking in Finder/Explorer
!Format: txt              ! output a tab-delimited table that can be opened in Numbers (Mac) automatically from the terminal command line
!Padding: '0.0'

File: System_main_tbl.txt
Table: System
Columns: index Pressure Temperature

! custom expressions need to be at the end and are processed left to right; avoid special characters like in FeO* or Mg#
File: Liquid_comp_tbl.txt
Table: "Liquid Composition"
Columns: SiO2 TiO2 Al2O3 Fe2O3 Cr2O3 FeO MnO MgO NiO CaO Na2O K2O P2O5 H2O CO2 FeOtot={FeO}+0.9*{Fe2O3} Mgnum=({MgO}/40.3044)/(({MgO}/40.3044)+({FeO}/71.8464)) Mgpc=100*{Mgnum}

File: Phase_mass_tbl.txt
Table: Phase
Columns: liquid1 clinopyroxene1 clinopyroxene2 fluid1 olivine1 plagioclase1 spinel1

Delimiter: comma        ! default input delimiter is space, but .tbl files are comma-delimited

File: olivine.tbl
Columns: fayalite,forsterite

File: plagioclase.tbl
Columns: albite,anorthite,sanidine

For this example you would type:

Code Select Expand

column_pick.command col_custom.txt > aaa.csv
Or you can use the "-c col_custom.txt" switch to the run-alphamelts.command script, in which case the output will go to "alphaMELTS_tbl.txt". You would need the "Output: both" line in your .melts file to make sure the .tbl files are written.


Paula

[Liquid_comp_tbl.txt>aaa.xlsx]

#3

The MELTS family of algorithms, and scientific discussion / column-pick can not transfer i...

Last post by Kai Wen - November 24, 2025, 09:19:22 AM

Dear Paul,
I open column-pick command after installing perl. It could produce a excel, but it told me can not download information, the new excel is just 1 Kb. My code is Liquid_comp_tbl.txt>aaa.xlsx, is there any thing wrong? Or need a comparable excel version?
Best,
Kai

#4

alphaMELTS for MATLAB/Python / Re: How to solve 'Can not find...

Last post by ll863628123 - October 12, 2025, 07:30:46 PM

Thank you very much, the code worked.

#5

Windows / Re: Nothing seems to work

Last post by victor_13 - October 12, 2025, 07:06:42 AM

Hi,

I'm experiencing the same issue that others have reported. I've been trying to use MELTS_Excel for several days, but I keep getting the following error message:

''Server returned no results, giving up''

I've tried using different versions of the MELTS_Excel spreadsheet, but I always get the same error.

At this point, I'm not sure what else to try to make it work properly. Any advice or suggestions would be greatly appreciated.

#6

Windows / Re: Nothing seems to work

Last post by Paula - October 09, 2025, 08:39:19 AM

I wonder if there is a restriction on access from outside the U.S. for the new server. I'll see if I can find out more and get back to you.

#7

alphaMELTS for MATLAB/Python / Re: How to solve 'Can not find...

Last post by Paula - October 09, 2025, 08:34:27 AM

https://github.com/magmasource/alphaMELTS/releases

#8

Windows / Re: Nothing seems to work

Last post by CHN_L - October 08, 2025, 06:55:37 PM

I'm sorry i have clicked the "unlock" checkbox but it still not work, maybe I should add a websites?

Calculation number: 1
InputXML: <MELTSinput><initialize><modelSelection>MELTS_v1.0.x</modelSelection><SiO2>74.39</SiO2><TiO2>0.18</TiO2><Al2O3>13.55</Al2O3><Fe2O3>0.360480704996108</Fe2O3><FeO>0.975635492235283</FeO><MgO>0.5</MgO><CaO>1.43</CaO><Na2O>3.36</Na2O><K2O>5.09</K2O><H2O>10</H2O></initialize><calculationMode>equilibrate</calculationMode><title>MELTS Web Service called from Excel. [created 2014Apr23] (version 1.0.3)</title><sessionID></sessionID><constraints><setTP><initialT>800</initialT><initialP>2000</initialP><fo2Path>nno</fo2Path><fo2Offset>0</fo2Offset></setTP></constraints><suppressPhase>amphibole</suppressPhase><suppressPhase>biotite</suppressPhase><fractionationMode>fractionateNone</fractionationMode></MELTSinput>
Request sent: 2025/10/9 9:52:36
Current server state: 1
Time limit reached: 2025/10/9 9:52:38
Calculation failed, trying again...
Request sent: 2025/10/9 9:52:38
Current server state: 1
Time limit reached: 2025/10/9 9:52:58
Two consecutive failures. Aborting...

#9

Windows / Re: Nothing seems to work

Last post by CHN_L - October 08, 2025, 06:47:40 PM

I'm sorry i have clicked the "unlock" checkbox but it still not work, maybe I should add a websites?

#10

alphaMELTS for MATLAB/Python / Re: How to solve 'Can not find...

Last post by ll863628123 - October 08, 2025, 01:34:51 AM

Thank you for your reply, Paula. The system PATH variable should be set correctly, but I couldn't find any .dll files on https://github.com/magmasource/alphaMELTS. Perhaps the libalphamelts.dll file needs to be downloaded from somewhere else. Could you please tell me where to get it?