4.42.3 Can you answer these questions?

4.42.3.1 Number Formatting Functions Do Not Evaluate with ExportString
4.42.3.2 DSolve Throw::nocatch: Uncaught Throw[$Failed,balancefail] returned to top level. error in 11.2
4.42.3.3 Solve for several constants using a set of initial conditions
4.42.3.1 Number Formatting Functions Do Not Evaluate with ExportString

https://mathematica.stackexchange.com/questions/158694/number-formatting-functions-do-not-evaluate-with-exportstring

 
I need to export in a particular text file format and tried NumberForm, PaddedForm, AccountingForm, and DecimalForm to see which would work best.  To my surprise only NumberForm evaluates when  ...
 
- asked by Edmund 3votes
4.42.3.2 DSolve Throw::nocatch: Uncaught Throw[$Failed,balancefail] returned to top level. error in 11.2

https://mathematica.stackexchange.com/questions/158817/dsolve-thrownocatch-uncaught-throwfailed-balancefail-returned-to-top-level

 
Reported also to WRI. [CASE:3965533] 
 
 
 
I am in the process of updating Kamke differentional equations tests for 11.2 when encountered a new error I have not seen before on one of the Kamke ODE's  ...
 
- asked by Nasser 3votes
4.42.3.3 Solve for several constants using a set of initial conditions

https://mathematica.stackexchange.com/questions/158783/solve-for-several-constants-using-a-set-of-initial-conditions

 
I have a set of differential equations that I am trying to solve for chemical reaction rate constants. So far I can get DSolve to solve the ODEs with initial conditions which provides the chemical  ...
 
- asked by razzle_dazzle_84 1vote