points 1. and 2.

Author: galabovaa

check/CMakeLists.txt

@@ -48,7 +48,6 @@ if ((NOT FAST_BUILD OR ALL_TESTS) AND NOT (BUILD_EXTRA_UNIT_ONLY))
       TestHighsRbTree.cpp
       TestHighsSparseMatrix.cpp
       TestHighsVersion.cpp
-      TestHipo.cpp
       TestHSet.cpp
       TestICrash.cpp
       TestIis.cpp
@@ -82,6 +81,11 @@ if ((NOT FAST_BUILD OR ALL_TESTS) AND NOT (BUILD_EXTRA_UNIT_ONLY))
       TestUserScale.cpp
       Avgas.cpp)
 
+
+  if (HIPO)
+      list(APPEND TEST_SOURCES TestHipo.cpp)
+  endif()
+
   set(OPT_LEVEL_CHANGED OFF)
 
   if(CMAKE_CXX_FLAGS_RELEASE MATCHES "-O[0-9s]" AND NOT CMAKE_CXX_FLAGS_RELEASE MATCHES "-O3")

highs/lp_data/HighsSolve.cpp

@@ -718,11 +718,18 @@ bool useHipo(const HighsOptions& options,
     use_hipo = false;
   } else if (specific_solver_option_value == kIpmString ||
              specific_solver_option_value == kHipoString || force_ipm) {
+
 #ifdef HIPO
     use_hipo = true;
 #else
+    if (specific_solver_option_value == kHipoString) {
+    highsLogUser(options.log_options, HighsLogType::kError,
+                  "HiPO is not available in this build.\n");
+    return HighsStatus::kError;
+
     use_hipo = false;
 #endif
+
   }
   if (options.run_centring) use_hipo = false;
   // Later decide between HiPO and IPX based on LP properties