diff --git a/src/iss/arch/riscv_hart_common.h b/src/iss/arch/riscv_hart_common.h
index d5b3554..924f928 100644
--- a/src/iss/arch/riscv_hart_common.h
+++ b/src/iss/arch/riscv_hart_common.h
@@ -412,8 +412,10 @@ template <typename BASE, typename LOGCAT = logging::disass> struct riscv_hart_co
         // Load ELF data
         if(reader.load(name)) {
             // check elf properties
-            if(reader.get_class() != expected_elf_class)
+            if(reader.get_class() != expected_elf_class) {
+                CPPLOG(ERR) << "ISA missmatch, selected XLEN does not match supplied file ";
                 return false;
+            }
             if(reader.get_type() != ELFIO::ET_EXEC)
                 return false;
             if(reader.get_machine() != ELFIO::EM_RISCV)