skip test MIPEX-readertest-cip-rgn.zpl if LPS=xprs

- an LP solve fails with
    lpi_xprs.c:2083: LP Error: Xpress returned 11
    (node 1) error in strong branching call for variable <t_t_x$ACD2>
     with solution 0.446071
  SCIP recovers

Author: svigerske

check/CMakeLists.txt

@@ -1272,6 +1272,7 @@ if(SCIP_WITH_EXACTSOLVE)
                 configure_file(interactiveshell/readertest-wrongformat.bat.in interactiveshell/readertest-${extension}-${basename}.bat)
                 set(regex "${message_format_${extension}}")
             endif()
+            if(NOT ((${extension} STREQUAL "cip") AND (${basename} STREQUAL "rgn.zpl") AND (${LPS} STREQUAL "xprs")))
             add_test(NAME MIPEX-readertest-${extension}-${basename}
                     COMMAND $<TARGET_FILE:scip>
                     -c "set load ${PROJECT_SOURCE_DIR}/check/coverage/settings/exact-default.set"
@@ -1283,6 +1284,7 @@ if(SCIP_WITH_EXACTSOLVE)
                                     FAIL_REGULAR_EXPRESSION "ERROR"
                                     DEPENDS scip-build
                                 )
+            endif()  # LP Error: Xpress returned 11, #3724
         endforeach(extension)
     endforeach(instance)
     #