diff --git a/misc-scripts/id_mapping/dump_by_seq_region.pl b/misc-scripts/id_mapping/dump_by_seq_region.pl
index 22b54bf89df526ae2e6477404090aa0d22d26a66..4e320f9eaee3b5064b1e6f1b9a7d5b3ec2cf734e 100755
--- a/misc-scripts/id_mapping/dump_by_seq_region.pl
+++ b/misc-scripts/id_mapping/dump_by_seq_region.pl
@@ -1,4 +1,6 @@
 #!/usr/bin/env perl
+# Don't change the above line.
+# Change the PATH in the myRun.ksh script if you want to use another perl.
 
 =head1 NAME
 
diff --git a/misc-scripts/id_mapping/dump_cache.pl b/misc-scripts/id_mapping/dump_cache.pl
index 00d01a3d1464a478624aa3bd035b86248f3a94d0..d10aba8cd4f4cde9f074086985072150d05f0439 100755
--- a/misc-scripts/id_mapping/dump_cache.pl
+++ b/misc-scripts/id_mapping/dump_cache.pl
@@ -1,4 +1,6 @@
 #!/usr/bin/env perl
+# Don't change the above line.
+# Change the PATH in the myRun.ksh script if you want to use another perl.
 
 =head1 NAME
 
diff --git a/misc-scripts/id_mapping/fake_stable_id_mapping.pl b/misc-scripts/id_mapping/fake_stable_id_mapping.pl
index 0aa822721477534ed103cb8d9cb6e8d70b94d400..c01698366162277b3184f476a12a1167a829cffb 100755
--- a/misc-scripts/id_mapping/fake_stable_id_mapping.pl
+++ b/misc-scripts/id_mapping/fake_stable_id_mapping.pl
@@ -1,4 +1,6 @@
 #!/usr/bin/env perl
+# Don't change the above line.
+# Change the PATH in the myRun.ksh script if you want to use another perl.
 
 =head1 NAME
 
diff --git a/misc-scripts/id_mapping/id_mapping.pl b/misc-scripts/id_mapping/id_mapping.pl
index 3aada47011e48cb3fbcd09b4c1f57273348e0b3d..d0fa3d66d618daac9a53175d320d1092f2e2cf2d 100755
--- a/misc-scripts/id_mapping/id_mapping.pl
+++ b/misc-scripts/id_mapping/id_mapping.pl
@@ -1,4 +1,6 @@
 #!/usr/bin/env perl
+# Don't change the above line.
+# Change the PATH in the myRun.ksh script if you want to use another perl.
 
 =head1 NAME
 
diff --git a/misc-scripts/id_mapping/run.pl b/misc-scripts/id_mapping/run.pl
index dfd4972958909c122978cad3d21b73f8670aea45..156caf3c7ab952cc777205aec1d981a3f18e591c 100755
--- a/misc-scripts/id_mapping/run.pl
+++ b/misc-scripts/id_mapping/run.pl
@@ -1,4 +1,6 @@
 #!/usr/bin/env perl
+# Don't change the above line.
+# Change the PATH in the myRun.ksh script if you want to use another perl.
 
 =head1 NAME
 
diff --git a/misc-scripts/id_mapping/synteny_rescore.pl b/misc-scripts/id_mapping/synteny_rescore.pl
index ba1591ebcd642265b912844a8d4c300cb7428e50..5d6f95d9a19df7180257da460ef510d664834abe 100755
--- a/misc-scripts/id_mapping/synteny_rescore.pl
+++ b/misc-scripts/id_mapping/synteny_rescore.pl
@@ -1,4 +1,6 @@
 #!/usr/bin/env perl
+# Don't change the above line.
+# Change the PATH in the myRun.ksh script if you want to use another perl.
 
 =head1 NAME
 
diff --git a/misc-scripts/id_mapping/utils/manage_id_mapping_tables.pl b/misc-scripts/id_mapping/utils/manage_id_mapping_tables.pl
index 03f167e55368f7569efba0cb24a23f5c584f711b..46e5020a4f0d02edc9cce30ce8f05cbdcddd840a 100755
--- a/misc-scripts/id_mapping/utils/manage_id_mapping_tables.pl
+++ b/misc-scripts/id_mapping/utils/manage_id_mapping_tables.pl
@@ -1,4 +1,6 @@
 #!/usr/bin/env perl
+# Don't change the above line.
+# Change the PATH in the myManager.ksh script if you want to use another perl.
 
 =head1 NAME