| phrGetErrorFileOn | R Documentation | 
Retrieve the current value of the error file switch.
phrGetErrorFileOn()
TRUE if error messages are currently being written to file.
https://water.usgs.gov/water-resources/software/PHREEQC/IPhreeqc.pdf
Other Error: 
phrGetErrorFileName(),
phrGetErrorStrings(),
phrGetErrorStringsOn(),
phrSetErrorFileName(),
phrSetErrorFileOn(),
phrSetErrorStringsOn()
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