diff --git a/src/ImportOPJ.cc b/src/ImportOPJ.cc
index 2b625d4..c49752f 100644
--- a/src/ImportOPJ.cc
+++ b/src/ImportOPJ.cc
@@ -12,6 +12,44 @@
 
 #include <liborigin/OPJFile.h>
 
+// The declaration of liborigin's OPJFile::colType() changed from
+//     const char *OPJFile::colType(int, int) const;
+// in version 20071119 to
+//     ColumnType OPJFile::colType(int, int) const;
+// in version 20080225. This function can be used to get the string
+// that colType() returned in liborigin/20071119 from the ColumnType
+// that colType() returns in liborigin/20080225. The use of this
+// function requires a build-dependency on liborigin (>= 20080225).
+QString colTypeToString(const ColumnType type) {
+    QString type_str = "";
+
+    switch (type) {
+    case X:
+        type_str = "X";
+        break;
+    case Y:
+        type_str = "Y";
+        break;
+    case Z:
+        type_str = "Z";
+        break;
+    case XErr:
+        type_str = "DX";
+        break;
+    case YErr:
+        type_str = "DY";
+        break;
+    case Label:
+        type_str = "LABEL";
+        break;
+    case NONE:
+        type_str = "NONE";
+        break;
+    }
+
+    return type_str;
+}
+
 ImportOPJ::ImportOPJ(MainWin *mw, QString filename)
 	: mw(mw),filename(filename)
 {}
@@ -44,13 +82,13 @@ int ImportOPJ::import() {
 		for (int j=0;j<nr_cols;j++) {
 			QString name(opj.colName(s,j));
 			spread->setColumnTitle(j,name.replace(QRegExp(".*_"),""));
-			spread->setColumnType(j,opj.colType(s,j));
+			spread->setColumnType(j,colTypeToString(opj.colType(s,j)));
 
 			for (int i=0;i<opj.numRows(s,j);i++) {
 				double *v = (double *) opj.oData(s,j,i,true);
 
 				LTableItem *item;
-				if(strcmp(opj.colType(s,j),"LABEL")) {	// number
+				if(strcmp(colTypeToString(opj.colType(s,j)),"LABEL")) {	// number
 					if(fabs(*v)>0 && fabs(*v)<2.0e-300)	// empty entry
 						continue;
 					item = new LTableItem( table, QTableItem::OnTyping,QString::number(*v));
@@ -62,7 +100,7 @@ int ImportOPJ::import() {
 		}
 	}
 	for (int s=0;s<opj.numMatrices();s++) {
-		kdDebug()<<"		Matrix "<<s+1<<" : "<<opj.matrixName(s)<<" (ParentFolder : "<<opj.matrixParentFolder(s)<<")"<<endl;
+		kdDebug()<<"		Matrix "<<s+1<<" : "<<opj.matrixName(s)<<endl; //" (ParentFolder : "<<opj.matrixParentFolder(s)<<")"<<endl;
 		kdDebug()<<"			Label : "<<opj.matrixLabel(s)<<" Cols/Rows : "<<opj.numMatrixCols(s)<<'/'<<opj.numMatrixRows(s)<<endl;
 		kdDebug()<<"			Formula : "<<opj.matrixFormula(s)<<" DisplayType : "<<opj.matrixNumDisplayType(s)<<endl;
 
@@ -99,7 +137,7 @@ int ImportOPJ::import() {
 
 	QString notes = mw->getProject()->Notes();
 	for (int s=0;s<opj.numNotes();s++) {
-		kdDebug()<<"		Note "<<s+1<<" : "<<opj.noteName(s)<<" (ParentFolder : "<<opj.noteParentFolder(s)<<")"<<endl;
+		kdDebug()<<"		Note "<<s+1<<" : "<<opj.noteName(s)<<endl; //" (ParentFolder : "<<opj.noteParentFolder(s)<<")"<<endl;
 		kdDebug()<<"			Label : "<<opj.noteLabel(s)<<" Text : "<<opj.noteText(s)<<endl;
 		notes.append(QString(opj.noteLabel(s))+":\n");
 		notes.append(opj.noteText(s));
@@ -115,7 +153,7 @@ int ImportOPJ::import() {
 	}
 
 	for (int s=0;s<opj.numGraphs();s++) {
-		kdDebug()<<"		Graph "<<s+1<<" : "<<opj.graphName(s)<<" (ParentFolder : "<<opj.graphParentFolder(s)<<")"<<endl;
+		kdDebug()<<"		Graph "<<s+1<<" : "<<opj.graphName(s)<<endl; //" (ParentFolder : "<<opj.graphParentFolder(s)<<")"<<endl;
 		kdDebug()<<"			Label : "<<opj.graphLabel(s)<<" Layers : "<<opj.numLayers(s)<<endl;
 
 		Worksheet *work = mw->newWorksheet();
@@ -139,8 +177,10 @@ int ImportOPJ::import() {
 #else
 			kdDebug()<<"Layer	x axis : "<<opj.layerXAxisTitle(s,l).txt<<endl;
 			kdDebug()<<"Layer	y axis : "<<opj.layerYAxisTitle(s,l).txt<<endl;
-			Label *xlabel = new Label(parseOriginText(opj.layerXAxisTitle(s,l).txt));
-			Label *ylabel = new Label(parseOriginText(opj.layerYAxisTitle(s,l).txt));
+
+            // The name Label is ambiguous, therefore use LPLabel here.
+			LPLabel *xlabel = new LPLabel(parseOriginText(opj.layerXAxisTitle(s,l).txt));
+			LPLabel *ylabel = new LPLabel(parseOriginText(opj.layerYAxisTitle(s,l).txt));
 			kdDebug()<<"Layer	legend : "<<opj.layerLegend(s,l).txt<<endl;
 #endif
 			plot->getAxis(0)->setLabel(xlabel);
@@ -342,11 +382,11 @@ int ImportOPJ::import() {
 			}
 
 			// axis range
-			vector<double> xrange=opj.layerXRange(s,l);
-			vector<double> yrange=opj.layerYRange(s,l);
+			graphLayerRange xrange=opj.layerXRange(s,l);
+			graphLayerRange yrange=opj.layerYRange(s,l);
 			LRange range[2];
-			range[0] = LRange(xrange[0],xrange[1]);
-			range[1] = LRange(yrange[0],yrange[1]);
+			range[0] = LRange(xrange.min,xrange.max);
+			range[1] = LRange(yrange.min,yrange.max);
 			plot->setActRanges(range);
 
 			// axis scale
diff --git a/src/Label.h b/src/Label.h
index b61c55b..5aa7097 100644
--- a/src/Label.h
+++ b/src/Label.h
@@ -66,4 +66,10 @@ private:
 	bool is_texlabel;		// if it is a tex label
 };
 
+// <liborigin/OPJFile.h> defines an enumerator of the type ColumnType with
+// the name Label in the global namespace. Since the class Label defined in
+// this file ("Label.h") collides with the aforementioned enumerator in
+// "ImportOPJ.cc" we define a synonym for Label here to avoid the ambiguity.
+typedef Label LPLabel;
+
 #endif //LABEL_H