diff --git a/docs/source/manual/openfpga_shell/openfpga_commands/setup_commands.rst b/docs/source/manual/openfpga_shell/openfpga_commands/setup_commands.rst
index e955592c6..ed7f594d6 100644
--- a/docs/source/manual/openfpga_shell/openfpga_commands/setup_commands.rst
+++ b/docs/source/manual/openfpga_shell/openfpga_commands/setup_commands.rst
@@ -460,6 +460,10 @@ pcf2place
   .. option:: --no_time_stamp
 
     Do not print time stamp in output files
+  
+  .. option:: --reduce_error_to_warning
+
+    Reduce error to warning while reading commands in pcf file
 
   .. option:: --verbose
 
diff --git a/libs/libpcf/src/io/pcf_reader.cpp b/libs/libpcf/src/io/pcf_reader.cpp
index a1dde16de..52f41dc73 100644
--- a/libs/libpcf/src/io/pcf_reader.cpp
+++ b/libs/libpcf/src/io/pcf_reader.cpp
@@ -27,7 +27,8 @@ constexpr const char COMMENT = '#';
  * Return 1 if there are serious errors when parsing data
  * Return 2 if fail when opening files
  *******************************************************************/
-int read_pcf(const char* fname, PcfData& pcf_data) {
+int read_pcf(const char* fname, PcfData& pcf_data,
+             bool reduce_error_to_warning = false) {
   vtr::ScopedStartFinishTimer timer("Read " + std::string(fname));
 
   /* Create a file handler */
@@ -57,17 +58,16 @@ int read_pcf(const char* fname, PcfData& pcf_data) {
           pcf_data.set_io_pin(io_id, pin_name);
         } else if (word[0] == COMMENT) {  // if it's a comment
           break;  // or ignore the full line comment and move on
-        } else if (word.find("set_clk") == 0 || word.find("set_reset") == 0) {
-          /* set_clk and set_rest are known commands for Arkangel, disable the
-           * error message for these two commands when call read_pcf function
-           */
-          break;
         } else {
-          /* Reach unknown command for OpenFpga, error out */
-          VTR_LOG_ERROR("Unknown command '%s'!\n", word.c_str());
-          num_err++;
-          break;  // and move onto next line. without this, it will accept
-                  // more following values on this line
+          if (reduce_error_to_warning) {
+            break;
+          } else {
+            /* Reach unknown command for OpenFpga, error out */
+            VTR_LOG_ERROR("Unknown command '%s'!\n", word.c_str());
+            num_err++;
+            break;  // and move onto next line. without this, it will accept
+                    // more following values on this line
+          }
         }
       }
     }
diff --git a/libs/libpcf/src/io/pcf_reader.h b/libs/libpcf/src/io/pcf_reader.h
index 347a50b68..aa32ee8cb 100644
--- a/libs/libpcf/src/io/pcf_reader.h
+++ b/libs/libpcf/src/io/pcf_reader.h
@@ -16,7 +16,7 @@ namespace openfpga {
 
 /* Parse a .pcf file through a stream, return an object which contains all the
  * data */
-int read_pcf(const char* fname, PcfData& pcf_data);
+int read_pcf(const char* fname, PcfData& pcf_data, bool reduce_error_to_warning = false);
 
 } /* End namespace openfpga*/
 
diff --git a/openfpga/src/base/openfpga_pcf2place_template.h b/openfpga/src/base/openfpga_pcf2place_template.h
index 4c430aaad..4a5ed4757 100644
--- a/openfpga/src/base/openfpga_pcf2place_template.h
+++ b/openfpga/src/base/openfpga_pcf2place_template.h
@@ -35,6 +35,8 @@ int pcf2place_wrapper_template(const Command& cmd,
   CommandOptionId opt_no_time_stamp = cmd.option("no_time_stamp");
   CommandOptionId opt_pin_table_dir_convention =
     cmd.option("pin_table_direction_convention");
+  CommandOptionId opt_reduce_error_to_warning =
+    cmd.option("reduce_error_to_warning");
   CommandOptionId opt_verbose = cmd.option("verbose");
 
   std::string pcf_fname = cmd_context.option_value(cmd, opt_pcf);
@@ -71,7 +73,7 @@ int pcf2place_wrapper_template(const Command& cmd,
 
   /* Parse the input files */
   openfpga::PcfData pcf_data;
-  openfpga::read_pcf(pcf_fname.c_str(), pcf_data);
+  openfpga::read_pcf(pcf_fname.c_str(), pcf_data,cmd_context.option_enable(cmd, opt_reduce_error_to_warning));
   VTR_LOG("Read the design constraints from a pcf file: %s.\n",
           pcf_fname.c_str());
 
diff --git a/openfpga/src/base/openfpga_setup_command_template.h b/openfpga/src/base/openfpga_setup_command_template.h
index 3c8c41f77..88fec6d94 100644
--- a/openfpga/src/base/openfpga_setup_command_template.h
+++ b/openfpga/src/base/openfpga_setup_command_template.h
@@ -599,6 +599,10 @@ ShellCommandId add_pcf2place_command_template(
   shell_cmd.add_option("no_time_stamp", false,
                        "Do not print time stamp in output files");
 
+  /* Add an option '--reduce_error_to_warning' */   
+  shell_cmd.add_option("reduce_error_to_warning", false,
+                       "reduce error to warning while reading commands in pcf file");
+
   /* Add an option '--verbose' */
   shell_cmd.add_option("verbose", false, "Enable verbose output");