Ihor Posted May 10, 2022 Share Posted May 10, 2022 Hello, when i try to analyse my samples i have an error ''Newton-Raphson didn't converge after 999 iterations...'' on 1 and 2 samples. For example when i try to calculate water type with SpecE8 I have same error for 1 and 2 samples, but 3 allright, its Sr-OH water in result. I have same errors in 1 and 2 samples when I try to calculate something else with SpecE8. Maby it problem with my data, or with calculation properties? I'll be very grateful for your help. Quote Link to comment Share on other sites More sharing options...
Jia Wang Posted May 10, 2022 Share Posted May 10, 2022 Hello, GSS can use SpecE8 to calculate various secondary values based on the data provided in the spreadsheet. The program solves the problem with a numerical scheme that does not tolerate zero masses well. This is probably the issue with the two samples that failed. You can set the program to treat 0 value entries as no data. To enable this got to Analysis -> Options. You can also just remove the 0 value from the datasheet. For more information on calculation with SpecE8, you can refer to section 3.3 in the GWB Essentials User Guide. You can also investigate issues with a specific sample by launching a SpecE8 instant from GSS. Please see section 3.5 Launching SpecE8 and React in the GWB Essentials User Guide. Hope this helps, Jia Wang Aqueous Solutions LLC Quote Link to comment Share on other sites More sharing options...
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