don't catch errors while reading data file

Device/IO/DataFormatUtil.cpp

@@ -173,13 +173,11 @@ std::vector<double> DataUtil::Format::parse_doubles(const std::string& str)
     DataUtil::Format::readLineOfDoubles(result, iss);
     if (result.empty()) {
         std::string out = str;
-        const size_t max_string_length(10);
-        if (out.size() > max_string_length)
+        if (out.size() > 10) {
             out.resize(max_string_length, ' ');
-        out += " ...";
-        throw std::runtime_error("DataUtil::Format::parse_doubles -> Error! Cannot parse double "
-                                 "values from a string '"
-                                 + out + "'");
+            out += " ...";
+        }
+        throw std::runtime_error("Found '" + out + "' while expecting a floating-point number");
     }
     return result;
 }

Device/IO/ReadReflectometry.cpp

@@ -31,15 +31,8 @@ Datafield* ReadReflectometry::readDatafield(std::istream& inStream)
     // Read numbers from file:
     while (std::getline(inStream, line)) {
         line = BaseUtil::String::trim(line);
-        try {
-            std::vector<double> rowVec = DataUtil::Format::parse_doubles(line);
-
-            // take only non-negative Q values
-            if (rowVec[0] >= 0.0)
-                vecVec.push_back(rowVec);
-        } catch (...) { // #bamigration +++ This eats useful errors away...
-            continue;
-        }
+        std::vector<double> rowVec = DataUtil::Format::parse_doubles(line); // may throw
+        vecVec.push_back(rowVec);
     }
 
     // validate - There is at least one row and at least two columns
@@ -55,6 +48,8 @@ Datafield* ReadReflectometry::readDatafield(std::istream& inStream)
         if (vecVec[row].size() != ncols)
             throw std::runtime_error("The number of columns varies among the rows");
         double Q = vecVec[row][0];
+        if (Q < 0)
+            continue; // just ignore invalid Q entries
         switch (ncols) {
         case 2:
             QvsR[Q] = vecVec[row][1];