diff --git a/compiler/cli.py b/compiler/cli.py
index 7f9a3db6b..36b8baf6f 100644
--- a/compiler/cli.py
+++ b/compiler/cli.py
@@ -57,7 +57,12 @@ def add_pash_args(self):
         )
         self.add_argument(
             "--assert_compiler_success",
-            help="assert that the compiler succeeded (used to make tests more robust)",
+            help="assert that the compiler succeeded with no general error occuring",
+            action="store_true",
+        )
+        self.add_argument(
+            "--assert_all_regions_parallelizable",
+            help="assert that the compiler succeeded with all regions being parallelizable and no general error occuring (used to make tests more robust)",
             action="store_true",
         )
         self.add_argument(
diff --git a/compiler/custom_error.py b/compiler/custom_error.py
index eedb6f738..4b2e42444 100644
--- a/compiler/custom_error.py
+++ b/compiler/custom_error.py
@@ -2,4 +2,11 @@ class UnparallelizableError(Exception):
     pass
 
 class AdjLineNotImplementedError(Exception):
-    pass
\ No newline at end of file
+    pass
+
+# to be raised in pash_compiler if a UnparallelizableError is caught at any point running the compiler
+#   primarily to differentiate 
+#       --assert_compiler_success (exit with error only under general exceptions caught) 
+#       --assert_all_regions_parallelizable (exit with error when regions are found not parallelizable + general exceptions)
+class NotAllRegionParallelizableError(Exception): 
+    pass 
\ No newline at end of file
diff --git a/compiler/orchestrator_runtime/pash_init_setup.sh b/compiler/orchestrator_runtime/pash_init_setup.sh
index 0bb4fae7a..966474a5c 100644
--- a/compiler/orchestrator_runtime/pash_init_setup.sh
+++ b/compiler/orchestrator_runtime/pash_init_setup.sh
@@ -13,6 +13,7 @@ export pash_output_time_flag=1
 export pash_execute_flag=1
 export pash_dry_run_compiler_flag=0
 export pash_assert_compiler_success_flag=0
+export pash_assert_all_regions_parallelizable_flag=0
 export pash_checking_log_file=0
 export pash_checking_debug_level=0
 export pash_avoid_pash_runtime_completion_flag=0
@@ -51,6 +52,10 @@ do
         export pash_assert_compiler_success_flag=1
     fi
 
+    if [ "--assert_all_regions_parallelizable" == "$item" ]; then
+        export pash_assert_all_regions_parallelizable_flag=1
+    fi
+
     if [ "--log_file" == "$item" ]; then
         pash_checking_log_file=1
     fi
diff --git a/compiler/orchestrator_runtime/pash_prepare_call_compiler.sh b/compiler/orchestrator_runtime/pash_prepare_call_compiler.sh
index c05faf681..22a2b37c8 100644
--- a/compiler/orchestrator_runtime/pash_prepare_call_compiler.sh
+++ b/compiler/orchestrator_runtime/pash_prepare_call_compiler.sh
@@ -33,6 +33,12 @@ pash_redir_output echo "$$: (2) Before asking the daemon for compilation..."
 msg="Compile:${pash_compiled_script_file}| Variable File:${pash_runtime_shell_variables_file}| Input IR File:${pash_input_ir_file}"
 daemon_response=$(pash_communicate_daemon "$msg") # Blocking step, daemon will not send response until it's safe to continue
 
+if [[ "$daemon_response" == *"not all regions are parallelizable"* ]]; then
+    pash_all_region_parallelizable=1 
+else 
+    pash_all_region_parallelizable=0 
+fi
+
 if [[ "$daemon_response" == *"OK:"* ]]; then
     pash_runtime_return_code=0
 elif [ -z "$daemon_response" ]; then
@@ -51,7 +57,20 @@ response_args=($daemon_response)
 process_id=${response_args[1]}
 
 pash_redir_output echo "$$: (2) Compiler exited with code: $pash_runtime_return_code"
-if [ "$pash_runtime_return_code" -ne 0 ] && [ "$pash_assert_compiler_success_flag" -eq 1 ]; then
+
+## only when --assert_all_regions_parallellizable is used do we care about all regions being parallelizable
+if [ "$pash_all_region_parallelizable" -ne 0 ] && [ "$pash_assert_all_regions_parallelizable_flag" -eq 1 ]; then
+    pash_redir_output echo "$$: ERROR: (2) Compiler failed with error code because some regions were not parallelizable: $pash_all_region_parallelizable while assert_all_regions_parallelizable_flag was enabled! Exiting PaSh..."
+    exit 1
+fi
+
+if [ "$pash_runtime_return_code" -ne 0 ] && [ "$pash_assert_all_regions_parallelizable_flag" -eq 1 ]; then
+    pash_redir_output echo "$$: ERROR: (2) Compiler failed with error code: $pash_runtime_return_code while assert_all_regions_parallelizable_flag was enabled! Exiting PaSh..."
+    exit 1
+fi
+
+## for pash_assert_compiler_success_flag, exit when return code is 0 (general exception caught) and not when all regions are parallelizable
+if [ "$pash_runtime_return_code" -ne 0 ] && [ "$pash_all_region_parallelizable" -eq 0 ] && [ "$pash_assert_compiler_success_flag" -eq 1 ]; then
     pash_redir_output echo "$$: ERROR: (2) Compiler failed with error code: $pash_runtime_return_code while assert_compiler_success was enabled! Exiting PaSh..."
     exit 1
 fi
diff --git a/compiler/pash_compilation_server.py b/compiler/pash_compilation_server.py
index 51f531574..d53e2af2a 100644
--- a/compiler/pash_compilation_server.py
+++ b/compiler/pash_compilation_server.py
@@ -14,6 +14,7 @@
 import server_util
 
 from cli import BaseParser
+from custom_error import * 
 
 ##
 ## A Daemon (not with the strict Unix sense)
@@ -252,6 +253,7 @@ def compile_and_add(self, compiled_script_file, var_file, input_ir_file):
         process_id = self.get_next_id()
         run_parallel = False
         compile_success = False
+        all_region_parallelizable = True 
 
         variable_reading_start_time = datetime.now()
         # Read any shell variables files if present
@@ -269,9 +271,15 @@ def compile_and_add(self, compiled_script_file, var_file, input_ir_file):
         ## Add the process_id -> input_ir mapping
         self.add_proc_id_map(process_id, input_ir_file, compiler_config)
 
-        ast_or_ir = pash_compiler.compile_ir(
-            input_ir_file, compiled_script_file, config.pash_args, compiler_config
-        )
+        # check if any general exceptions are caught to report to --assert_compiler_success flag 
+        try: 
+            ast_or_ir = pash_compiler.compile_ir(
+                input_ir_file, compiled_script_file, config.pash_args, compiler_config
+            )
+        except NotAllRegionParallelizableError: 
+            ast_or_ir = None 
+            all_region_parallelizable = False
+                    
 
         daemon_compile_end_time = datetime.now()
         print_time_delta(
@@ -321,19 +329,28 @@ def compile_and_add(self, compiled_script_file, var_file, input_ir_file):
         else:
             ## Wait if we have more pipelines running than our current limit
             self.wait_until_limit(config.pash_args.parallel_pipelines_limit)
-
+        
         if compile_success:
             response = server_util.success_response(
                 f"{process_id} {compiled_script_file} {var_file} {input_ir_file}"
             )
+        elif not all_region_parallelizable: 
+            # send specified message to say not all regions are parallelizable instead of general exception caught
+            response = server_util.error_response(f"{process_id} not all regions are parallelizable; failed to compile")
+            self.unsafe_running = True
         else:
             response = server_util.error_response(f"{process_id} failed to compile")
             self.unsafe_running = True
+           
 
-        ## Do not increase the running procs if assert_compiler_success is enabled
+        ## Do not increase the running procs if assert_all_regions_parallelizable is enabled
         ##  and compilation failed, since nothing will run then.
-        if not compile_success and config.pash_args.assert_compiler_success:
-            pass
+        ## Do not increase when compile is not successful but regions are parallelizable (in the case that general exceptions are caught), 
+        ##  nothing will run in this case also 
+        if (not compile_success and config.pash_args.assert_all_regions_parallelizable): 
+            pass 
+        elif (not compile_success and all_region_parallelizable and config.pash_args.assert_compiler_success): 
+            pass 
         else:
             self.running_procs += 1
 
diff --git a/compiler/pash_compiler.py b/compiler/pash_compiler.py
index a949457ba..68b2e8676 100644
--- a/compiler/pash_compiler.py
+++ b/compiler/pash_compiler.py
@@ -96,8 +96,10 @@ def compile_ir(ir_filename, compiled_script_file, args, compiler_config):
         )
     except ExpansionError as e: 
         log("WARNING: Exception caught because some region(s) are not expandable and therefore unparallelizable:", e) 
+        raise NotAllRegionParallelizableError()
     except UnparallelizableError as e: 
         log("WARNING: Exception caught because some region(s) are unparallelizable:", e) 
+        raise NotAllRegionParallelizableError()
         # log(traceback.format_exc()) # uncomment for exact trace report (PaSh user should see informative messages for unparellizable regions) 
     except (AdjLineNotImplementedError, NotImplementedError) as e: 
         log("WARNING: Exception caught because some part is not implemented:", e)
diff --git a/evaluation/tests/test_evaluation_scripts.sh b/evaluation/tests/test_evaluation_scripts.sh
index 7deac9040..519365886 100755
--- a/evaluation/tests/test_evaluation_scripts.sh
+++ b/evaluation/tests/test_evaluation_scripts.sh
@@ -189,7 +189,7 @@ execute_tests() {
 }
 
 execute_tests "" "${script_microbenchmarks[@]}"
-execute_tests "--assert_compiler_success" "${pipeline_microbenchmarks[@]}"
+execute_tests "--assert_all_regions_parallelizable" "${pipeline_microbenchmarks[@]}"
 
 #cat ${results_time} | sed 's/,/./' > /tmp/a
 #cat /tmp/a | sed 's/@/,/' > ${results_time}