diff --git a/doc/plan.org b/doc/plan.org
index 7cb8842..d743656 100644
--- a/doc/plan.org
+++ b/doc/plan.org
@@ -165,6 +165,10 @@
 |            | - Can try P416 compiler                                                    |       |
 |            | - Next week Laurent not around: send email + Albert/Thomas/Edgar meeting   |       |
 |            |                                                                            |       |
+| 2019-03-30 |                                                                            |       |
+|            | Refactoring code                                                           |       |
+|            | Hitting expression bug                                                     |       |
+|            |                                                                            |       |
 |            |                                                                            |       |
 | 2019-03-30 | NAT64 1:1 table ICMP, ICMPv6 working                                       |       |
 |            | Will need some switch local ip addresses                                   |       |
@@ -1377,6 +1381,42 @@ Exists!
      - TYPE_CPU for ethernet
      - Port ingress offset (9 vs. 16 bit)
 
+**** p4c expression bug 2019-03-30
+Hit in master-thesis 0.4-28-g881643e
+
+#+BEGIN_SRC
+Warning: you requested the nanomsg event logger, but bmv2 was compiled without -DBMELOG, and the event logger cannot be activated
+Calling target program-options parser
+[14:01:44.334] [bmv2] [D] [thread 23356] Set default default entry for table 'MyIngress.icmp6': MyIngress.controller_debug_table_id - 2,
+[14:01:44.341] [bmv2] [D] [thread 23356] Set default default entry for table 'MyIngress.nat64': MyIngress.controller_debug_table_id - 1,
+[14:01:44.344] [bmv2] [D] [thread 23356] Set default default entry for table 'tbl_act': act -
+[14:01:44.345] [bmv2] [D] [thread 23356] Set default default entry for table 'tbl_act_0': act_0 -
+[14:01:44.345] [bmv2] [D] [thread 23356] Set default default entry for table 'tbl_nat64_icmp6_generic': MyIngress.nat64_icmp6_generic -
+[14:01:44.345] [bmv2] [D] [thread 23356] Set default default entry for table 'tbl_act_1': act_1 -
+[14:01:44.345] [bmv2] [D] [thread 23356] Set default default entry for table 'tbl_act_2': act_2 -
+[14:01:44.345] [bmv2] [D] [thread 23356] Set default default entry for table 'MyIngress.v4_networks': MyIngress.controller_debug_table_id - 5,
+[14:01:44.345] [bmv2] [D] [thread 23356] Set default default entry for table 'MyIngress.v6_networks': MyIngress.controller_debug_table_id - 3,
+[14:01:44.346] [bmv2] [D] [thread 23356] Set default default entry for table 'tbl_act_3': act_3 -
+Invalid entry type 'expression' in field list
+bad json:
+{
+   "type" : "expression",
+   "value" : {
+      "type" : "expression",
+      "value" : {
+         "left" : null,
+         "op" : "d2b",
+         "right" : {
+            "type" : "field",
+            "value" : [ "scalars", "metadata.chk_icmp6_na_ns" ]
+         }
+      }
+   }
+}
+
+
+#+END_SRC
+
 **** Only one LPM key supported in tables (2019-03-23)
 #+BEGIN_SRC
 ../p4src/static-mapping.p4(121): error: MyIngress.nat64, Multiple LPM keys in table
@@ -1413,7 +1453,7 @@ me available?
 I could work around this by using if(! .. .hit) { my_action(table_id)
 }, but it would not work with using default_action = ...
 
-**** No switch in actions, No conditional execution in actions
+**** DONE No switch in actions, No conditional execution in actions
 ***** 3 possible solutions
       - multi table (state as of 2019-03-28)
       - switch/if in actions: with shadow tables