diff --git a/planning/src/RS/rsCheck.cpp b/planning/src/RS/rsCheck.cpp
index 68e55ecf..58e9b4d5 100644
--- a/planning/src/RS/rsCheck.cpp
+++ b/planning/src/RS/rsCheck.cpp
@@ -4,13 +4,18 @@
 
 namespace pln {
 
+using std::vector;
 using std::string;
 using std::endl;
 
-bool do_check_blif(CStr cfn) {
+bool do_check_blif(CStr cfn,
+                   vector<string>& badInputs,
+                   vector<string>& badOutputs) {
   assert(cfn);
   uint16_t tr = ltrace();
   auto& ls = lout();
+  badInputs.clear();
+  badOutputs.clear();
 
   BLIF_file bfile(string{cfn});
 
@@ -58,7 +63,7 @@ bool do_check_blif(CStr cfn) {
   flush_out(true);
   ls << ">>>>> checking BLIF " << cfn << "  ..." << endl;
 
-  bool chk_ok = bfile.checkBlif();
+  bool chk_ok = bfile.checkBlif(badInputs, badOutputs);
   assert(chk_ok == bfile.chk_ok_);
 
   lprintf("=====   passed: %s\n", chk_ok ? "YES" : "NO");
@@ -193,10 +198,12 @@ bool do_check(const rsOpts& opts, bool blif_vs_csv) {
   lprintf("  checking %s file: %s\n", fileType, cfn);
 
   bool status;
-  if (blif_vs_csv)
-    status = do_check_blif(cfn);
-  else
+  if (blif_vs_csv) {
+    vector<string> badInp, badOut;
+    status = do_check_blif(cfn, badInp, badOut);
+  } else {
     status = do_check_csv(cfn);
+  }
 
   flush_out(true);
 
diff --git a/planning/src/RS/rsCheck.h b/planning/src/RS/rsCheck.h
index d33e97fa..8543ca9b 100644
--- a/planning/src/RS/rsCheck.h
+++ b/planning/src/RS/rsCheck.h
@@ -9,7 +9,9 @@ namespace pln {
 
 bool do_check(const rsOpts& opts, bool blif_vs_csv);
 
-bool do_check_blif(CStr cfn);
+bool do_check_blif(CStr cfn,
+                   std::vector<std::string>& badInputs,
+                   std::vector<std::string>& badOutputs);
 
 }
 
diff --git a/planning/src/file_io/pln_blif_file.cpp b/planning/src/file_io/pln_blif_file.cpp
index a2122796..35f74ada 100644
--- a/planning/src/file_io/pln_blif_file.cpp
+++ b/planning/src/file_io/pln_blif_file.cpp
@@ -343,9 +343,13 @@ bool BLIF_file::readBlif() noexcept {
   return true;
 }
 
-bool BLIF_file::checkBlif() noexcept {
+bool BLIF_file::checkBlif(vector<string>& badInputs,
+                          vector<string>& badOutputs) noexcept {
   chk_ok_ = false;
   err_msg_.clear();
+  badInputs.clear();
+  badOutputs.clear();
+
   auto& ls = lout();
 
   if (inputs_.empty() and outputs_.empty()) {
@@ -499,8 +503,6 @@ bool BLIF_file::checkBlif() noexcept {
 
   // -- write yaml file to check prim-DB:
   if (trace_ >= 8) {
-    //string written = pr_write_yaml( DSP19X2 );
-    //string written = pr_write_yaml( DSP38 );
     //string written = pr_write_yaml( FIFO36K );
     //string written = pr_write_yaml( FIFO18KX2 );
     string written = pr_write_yaml( TDP_RAM36K );
@@ -1329,8 +1331,8 @@ bool BLIF_file::createNodes() noexcept {
     }
     if (nd.kw_ == ".subckt" or nd.kw_ == ".gate") {
       if (nd.data_.size() > 1) {
-        if (nd.lnum_ == 47)
-          lputs8();
+        // if (nd.lnum_ == 47)
+        //   lputs8();
         const string& last = nd.data_.back();
         size_t llen = last.length();
         if (!last.empty() and llen < 4095) {
diff --git a/planning/src/file_io/pln_blif_file.h b/planning/src/file_io/pln_blif_file.h
index 241d935b..20666c78 100644
--- a/planning/src/file_io/pln_blif_file.h
+++ b/planning/src/file_io/pln_blif_file.h
@@ -266,7 +266,7 @@ struct BLIF_file : public fio::MMapReader
   virtual void reset(CStr nm, uint16_t tr = 0) noexcept override;
 
   bool readBlif() noexcept;
-  bool checkBlif() noexcept;
+  bool checkBlif(vector<string>& badInputs, vector<string>& badOutputs) noexcept;
 
   uint numInputs() const noexcept { return inputs_.size(); }
   uint numOutputs() const noexcept { return outputs_.size(); }
diff --git a/planning/src/main.cpp b/planning/src/main.cpp
index 2a8f896a..aa975907 100644
--- a/planning/src/main.cpp
+++ b/planning/src/main.cpp
@@ -1,4 +1,4 @@
-static const char* _pln_VERSION_STR = "pln0348";
+static const char* _pln_VERSION_STR = "pln0349";
 
 #include "RS/rsEnv.h"
 #include "util/pln_log.h"
diff --git a/planning/src/pin_loc/pcf_place.cpp b/planning/src/pin_loc/pcf_place.cpp
index ca7cb942..e9f11782 100644
--- a/planning/src/pin_loc/pcf_place.cpp
+++ b/planning/src/pin_loc/pcf_place.cpp
@@ -647,7 +647,7 @@ void PinPlacer::get_pcf_directions(
   }
 }
 
-bool PinPlacer::write_dot_place(const PcCsvReader& csv) {
+bool PinPlacer::write_placement(const PcCsvReader& csv) {
   flush_out(true);
   placed_inputs_.clear();
   placed_outputs_.clear();
@@ -657,7 +657,7 @@ bool PinPlacer::write_dot_place(const PcCsvReader& csv) {
   if (tr >= 3) {
     ls << "pin_c: writing .place output file: " << out_fn << endl;
     if (tr >= 7) {
-      ls << "write_dot_place() __ Creating .place file  get_param(--output) : "
+      ls << "write_placement() __ Creating .place file  get_param(--output) : "
          << out_fn << endl;
     }
     if (tr >= 5) {
@@ -686,7 +686,7 @@ bool PinPlacer::write_dot_place(const PcCsvReader& csv) {
     if (tr >= 1) {
       flush_out(true);
       err_puts();
-      lprintf2("[Error] pin_c: write_dot_place() output file is not writable: %s\n",
+      lprintf2("[Error] pin_c: write_placement() output file is not writable: %s\n",
                out_fn.c_str());
       flush_out(true);
     }
diff --git a/planning/src/pin_loc/pin_placer.cpp b/planning/src/pin_loc/pin_placer.cpp
index 6846f376..0a76297c 100644
--- a/planning/src/pin_loc/pin_placer.cpp
+++ b/planning/src/pin_loc/pin_placer.cpp
@@ -240,35 +240,14 @@ bool PinPlacer::read_and_write() {
       !(csv_name.empty() || no_b_json || output_name.empty()) &&
       user_pcf_.empty();
 
-  if (tr >= 4) {
+  if (tr >= 5) {
     ls << "\t usage_requirement_1 : " << boolalpha << usage_requirement_1 << endl;
     ls << "\t usage_requirement_2 : " << boolalpha << usage_requirement_2 << endl;
   }
 
   if (usage_requirement_0) {
-    /*
-    // generate new csv file with information from xml
-    // and csv for os flow
-    if (tr >= 2) {
-      ls << "(usage_requirement_0)\n"
-         << "generate new csv file with info from xml and csv for os flow"
-         << endl;
-    }
-    if (!generate_csv_file_for_os_flow()) {
-      CERROR << err_lookup("GENERATE_CSV_FILE_FOR_OS_FLOW") << endl;
-      return false;
-    }
-    // in os mode, the pcf does not contains any "-mode"
-    // we need to generate a temp pcf file with "-mode" option, which selects
-    // mode "Mode_GPIO"
-    if (user_pcf_.size()) {
-      if (!convert_pcf_for_os_flow(user_pcf_)) {
-        CERROR << err_lookup("GENERATE_PCF_FILE_FOR_OS_FLOW") << endl;
-        return false;
-      }
-    }
-    */
-  } else if (!usage_requirement_1 && !usage_requirement_2) {
+  }
+  else if (!usage_requirement_1 && !usage_requirement_2) {
     flush_out(true);
     if (tr >= 2)
       lputs("[Error] pin_c: !usage_requirement_1 && !usage_requirement_2\n");
@@ -454,13 +433,13 @@ bool PinPlacer::read_and_write() {
   finalize_edits();
 
   // --7. create .place file
-  if (!write_dot_place(csv_rd)) {
+  if (!write_placement(csv_rd)) {
     // error messages will be issued in callee
     if (tr) {
       flush_out(true);
-      ls << "[Error] pin_c: !write_dot_place(csv_rd)" << endl;
+      ls << "[Error] pin_c: !write_placement()" << endl;
       err_puts();
-      CERROR << "write_dot_place() failed" << endl;
+      CERROR << "write_placement() failed" << endl;
       flush_out(true);
     }
     return false;
diff --git a/planning/src/pin_loc/pin_placer.h b/planning/src/pin_loc/pin_placer.h
index 538e8ace..5f3856f6 100644
--- a/planning/src/pin_loc/pin_placer.h
+++ b/planning/src/pin_loc/pin_placer.h
@@ -242,7 +242,7 @@ struct PinPlacer {
 
   bool read_PCF(const PcCsvReader&);
 
-  bool write_dot_place(const PcCsvReader&);
+  bool write_placement(const PcCsvReader&);
 
   bool create_temp_pcf(PcCsvReader&);
 
diff --git a/planning/src/pin_loc/read_ports.cpp b/planning/src/pin_loc/read_ports.cpp
index 40c2e654..58760bf1 100644
--- a/planning/src/pin_loc/read_ports.cpp
+++ b/planning/src/pin_loc/read_ports.cpp
@@ -14,7 +14,7 @@ using fio::Fio;
 
 static bool s_is_fabric_blif(const string& fn) noexcept {
   size_t len = fn.length();
-  if (len < 12 or len > 5000)
+  if (len < 8 or len > 5000)
     return false;
   char buf[len + 2] = {};
   ::strcpy(buf, fn.c_str());
@@ -29,7 +29,7 @@ static bool s_is_fabric_blif(const string& fn) noexcept {
   Fio::split_spa(buf, W);
   if (W.size() < 2)
     return false;
-  if (W.back() != "eblif")
+  if (W.back() != "eblif" and W.back() != "blif")
     return false;
 
   const string& f = W[W.size() - 2];
@@ -1098,7 +1098,7 @@ bool PinPlacer::BlifReader::read_blif(const string& blif_fn, bool& checked_ok) n
   BLIF_file bfile(blif_fn);
 
   if (tr >= 4)
-    bfile.setTrace(3);
+    bfile.setTrace(4);
 
   bool exi = false;
   exi = bfile.fileExists();
@@ -1117,10 +1117,12 @@ bool PinPlacer::BlifReader::read_blif(const string& blif_fn, bool& checked_ok) n
     return false;
   }
 
+  vector<string> badInputs, badOutputs;
+
   if (not ::getenv("pinc_dont_check_blif")) {
     lprintf("____ BEGIN pinc_check_blif:  %s\n", cfn);
     flush_out(true);
-    checked_ok = do_check_blif(cfn);
+    checked_ok = do_check_blif(cfn, badInputs, badOutputs);
     flush_out(true);
     lprintf("           pinc_check_blif STATUS = %s\n\n",
             checked_ok ? "PASS" : "FAIL");