refact: logger error -> warn

.gitignore

@@ -87,3 +87,6 @@ test_*.ser
 html/
 latex/
 eclipse_dictionary.txt
+
+src/main/**/*.png
+src/main/**/*.gif

src/main/java/neqsim/chemicalReactions/chemicalReaction/ChemicalReactionList.java

@@ -112,7 +112,7 @@ public void readReactions(SystemInterface system) {
         }
       } while (dataSet.next());
     } catch (Exception ex) {
-      logger.error("could not add reacton: ", ex);
+      logger.error("could not add reaction: ", ex);
     }
   }
 

src/main/java/neqsim/physicalProperties/interfaceProperties/surfaceTension/GTSurfaceTensionFullGT.java

@@ -709,7 +709,7 @@ public static void initmu(SystemInterface sys, int ncomp, double t, double[] rho
       maxerr = Math.max(maxerr, Math.abs(mueq[i] / mueq2[i] - 1.0));
     }
     if (maxerr > reltol) {
-      logger.error("Flash is not properly solved.  Maximum relative error in chemical potential:  "
+      logger.warn("Flash is not properly solved.  Maximum relative error in chemical potential:  "
           + maxerr + " > " + reltol);
       throw new RuntimeException("Flash not solved!");
     }

src/main/java/neqsim/physicalProperties/physicalPropertyMethods/PhysicalPropertyMethod.java

@@ -50,7 +50,7 @@ public void setPhase(
   /** {@inheritDoc} */
   @Override
   public void tuneModel(double val, double temperature, double pressure) {
-    logger.error("model tuning not implemented!");
+    throw new UnsupportedOperationException("Unimplemented method 'tuneModel'");
   }
   // should contain phase objects ++ get diffusivity methods .. more ?
 }

src/main/java/neqsim/thermo/component/ComponentGEUnifacUMRPRU.java

@@ -400,7 +400,7 @@ public double getGamma(PhaseInterface phase, int numberOfComponents, double temp
     lngamma = lngammaResidual + lngammaCombinational;
 
     if (Double.isNaN(lngamma)) {
-      logger.error("gamma NaN......");
+      logger.warn("gamma NaN......");
       lngamma = 0.0;
       gamma = 1.0;
       dlngammadt = 0;

src/main/java/neqsim/thermo/phase/PhaseEos.java

@@ -108,7 +108,7 @@ public void init(double totalNumberOfMoles, int numberOfComponents, int type, Ph
               pt);
         }
       } catch (Exception ex) {
-        logger.error("Failed to solve for molarVolume within the iteration limit.");
+        logger.warn("Failed to solve for molarVolume within the iteration limit.");
         throw new RuntimeException(ex);
         // logger.error("too many iterations in volume calc!", ex);
         // logger.info("moles " + numberOfMolesInPhase);