diff --git a/Pmodules/libstd.bash b/Pmodules/libstd.bash
index eb8525d..e5a2f46 100644
--- a/Pmodules/libstd.bash
+++ b/Pmodules/libstd.bash
@@ -244,6 +244,33 @@ std::get_os_release() {
 	${func_map[${OS}]}
 }
 
+std::get_type() {
+	local -a signature=$(typeset -p "$1")
+	case ${signature[1]} in
+		-Ai* )
+			echo 'int dict'
+			;;
+		-A* )
+			echo 'dict'
+			;;
+		-ai* )
+			echo 'int array'
+			;;
+		-a* )
+			echo 'array'
+			;;
+		-i* )
+			echo 'integer'
+			;;
+		-- )
+			echo 'string'
+			;;
+		* )
+			echo 'none'
+			return 1
+	esac
+}
+
 # Local Variables:
 # mode: sh
 # sh-basic-offset: 8
diff --git a/Pmodules/modulecmd.bash.in b/Pmodules/modulecmd.bash.in
index 84b586e..871caf0 100644
--- a/Pmodules/modulecmd.bash.in
+++ b/Pmodules/modulecmd.bash.in
@@ -508,8 +508,20 @@ subcommand_load() {
 		fi
                 if [[ ${current_modulefile} =~ ${PMODULES_ROOT} ]] \
                            && [[ ! ${m} =~ / ]]; then
+			# the module is in our hierarchy but no version
+			# has been specified. We take the version from
+			# current_modulefile and append it
                         m+="/${current_modulefile##*/}"
                 fi
+		if [[ ${m} == Pmodules/*  ]] && [[ -n ${LOADEDMODULES} ]]; then
+			std::error "%s %s: %s" \
+				   "${CMD}" "${subcommand}" \
+				   "cannot load a Pmodules module because other modules are already load!"
+			std::die 3 "%s %s: %s -- %s\n" \
+                                 "${CMD}" "${subcommand}" \
+                                 "failed" \
+                                 "${m}"
+		fi
 		if [[ ":${LOADEDMODULES}:" =~ ":${m}:" ]]; then
                         continue
 		fi
@@ -1394,8 +1406,8 @@ pmodules_init() {
 	unset UseFlags
 	declare -Ag  UseFlags=()
 	declare -g Version="${PMODULES_VERSION}"
-        reset_modulepath
         reset_used_groups
+        reset_modulepath
         reset_used_releases
         init_manpath
         export_env \
@@ -1465,7 +1477,6 @@ subcommand_purge() {
 	local output=$("${modulecmd}" 'bash' 'purge' 2> "${tmpfile}")
 
 	local error=$( < "${tmpfile}")
-	${rm} "${tmpfile}"
 	if [[ "${error}" =~ ":ERROR:" ]]; then
                 local s=${error%%$'\n'*}
                 local error_txt='failed'
@@ -1755,8 +1766,6 @@ subcommand_search() {
                         func_print_line='print_line_csv'
                 }
 
-                local -r tmpfile=$1
-
                 if [[ "${opt_print_modulefiles}" == 'yes' ]]; then
                         print_modulefiles
                 elif [[ "${opt_print_csv}" == 'yes' ]]; then
@@ -1852,7 +1861,6 @@ subcommand_search() {
 			done
 		done
 		print_result "${tmpfile}"
-		${rm} -f "${tmpfile}"
 	}
 
 	while (( $# > 0 )); do
@@ -2262,7 +2270,16 @@ fi
 if [[ -n ${PMODULES_ENV} ]]; then
 	eval "$("${base64}" -d <<< "${PMODULES_ENV}" 2>/dev/null)"
 	if [[ -z ${Version} ]] || [[ ${Version} != ${PMODULES_VERSION} ]]; then
+		# the Pmodules version changed!
+		# we save _LMFILES_ and LOADEDMODULES and restore them
+		# later. Otherwise the Pmodules module would not be listed
+		# by module list
+		declare saved_LMFILES_="${_LMFILES_}"
+		declare saved_LOADEDMODULES="${LOADEDMODULES}"
 		pmodules_init
+		_LMFILES_="${saved_LMFILES_}"
+		LOADEDMODULES="${saved_LOADEDMODULES}"
+		export_env _LMFILES_ LOADEDMODULES
 	fi
 else
 	pmodules_init
@@ -2277,6 +2294,9 @@ case ${subcommand} in
 		declare -r tmpfile=$( ${mktemp} /tmp/Pmodules.XXXXXX ) \
 			|| std::die 1 "Oops: unable to create tmp file!"
 		;;
+	* )
+		declare -r tmpfile=''
+		;;
 esac
 
 declare options