Add check to IPH to ensure trough_loop_control and nSCA agree

ssc/cmod_trough_physical_iph.cpp

@@ -737,6 +737,19 @@ class cm_trough_physical_iph : public compute_module
         {
             // Collect Inputs
             {
+                // ADDED Trough Inputs (TMB 10/06/2023) for design point calculations
+                std::vector<double> trough_loop_vec = as_vector_double("trough_loop_control");
+                c_trough.m_trough_loop_control.assign(&trough_loop_vec[0], trough_loop_vec.size());
+
+                int actual_nSCA = trough_loop_vec[0];
+                int sca = as_integer("nSCA");
+
+                // Check if trough_loop_control number of sCA's matches the nSCA input
+                if (actual_nSCA != sca)
+                {
+                    throw exec_error("trough_physical_iph", "Mismatch nSCA");
+                }
+
                 c_trough.m_use_solar_mult_or_aperture_area = as_number("use_solar_mult_or_aperture_area"); // Use specified solar mult (0) or total aperture (1)
                 c_trough.m_specified_solar_mult = as_number("specified_solar_multiple");            // User specified solar mult
                 c_trough.m_specified_total_aperture = as_number("specified_total_aperture");    //[m2] User specified total aperture
@@ -959,10 +972,6 @@ class cm_trough_physical_iph : public compute_module
                 c_trough.m_sf_hdr_wallthicks = as_matrix("sf_hdr_wallthicks");    //[m] Imported header wall thicknesses, used if custom_sf_pipe_sizes is true
                 c_trough.m_sf_hdr_lengths = as_matrix("sf_hdr_lengths");          //[m] Imported header lengths, used if custom_sf_pipe_sizes is true
 
-
-                // ADDED Trough Inputs (TMB 10/06/2023) for design point calculations
-                std::vector<double> trough_loop_vec = as_vector_double("trough_loop_control");
-                c_trough.m_trough_loop_control.assign(&trough_loop_vec[0], trough_loop_vec.size());
             }
 
             // Calculate solar multiple (needed for other component constructors)