diff --git a/Pressure.h b/Pressure.h
index fc7209fe..31e2ee38 100644
--- a/Pressure.h
+++ b/Pressure.h
@@ -24,6 +24,7 @@ class cxxPressure:public cxxNumKeyword
 	void read_raw(CParser & parser);
 	LDBLE Pressure_for_step(int step_number);
 	std::vector<LDBLE> & Get_pressures(void) {return pressures;}
+	const std::vector<LDBLE> & Get_pressures(void)const {return pressures;}
 	int Get_count(void) const;
 	void Set_count(int i) {count = i;}
 	bool Get_equalIncrements(void) const {return equalIncrements;}
diff --git a/phreeqc/read.cpp b/phreeqc/read.cpp
index f2b7b6ed..f46ada85 100644
--- a/phreeqc/read.cpp
+++ b/phreeqc/read.cpp
@@ -10313,7 +10313,7 @@ read_copy(void)
 	default:
 		input_error++;
 		error_msg
-			("Expecting keyword solution, mix, kinetics, reaction, reaction_temperature, equilibrium_phases, exchange, surface, gas_phase, or solid_solutions, or cell.",
+			("Expecting keyword solution, mix, kinetics, reaction, reaction_pressure, reaction_temperature, equilibrium_phases, exchange, surface, gas_phase, or solid_solutions, or cell.",
 			 CONTINUE);
 		error_msg(line_save, CONTINUE);
 		check_line("End of use", FALSE, TRUE, TRUE, TRUE);