Hi, I am using freeradius-4.0.x version. This one works, (6) if ( "%{control:Tmp-String-7}" =~ /vendor-options.*\(number 43\)\(value (([0-9a-fA-F]{2}:)*[0-9a-fA-F]{2})/ ) { (6) EXPAND %{control:Tmp-String-7} (6) --> ((ClassName Policy)(name client-policy:1,6,00:A0:BC:6C:7E:64)(v4-reply-options [vendor-encapsulated-options])(vendor-options [((ClassName Option)(number 43)(value 01:03:00:A0:BC:14:44:01:00:02:01:03:11:05:00:44:00:44:07:00:43:00:43:01:01:02:01:03:06:07:01:BD:01:BD:01:01:02:01:07:00:87:00:88:01:01:02:01:06:C0:A8:64:00:18:07:00:16:00:17:01:01:02:01:03:11:06:C0:A8:64:00:18:07:00:A1:00:A1:19:01:01:21:01:01:26:38:68:74:74:70:3A:2F:2F:31:30:2E:34:33:2E:31:39:2E:31:38:3A:39:36:37:35:2F:6C:69:76:65:2F:43:50:45:4D:61:6E:61:67:65:72:2F:43:50:45:73:2F:67:65:6E:65:72:69:63:54:52:36:39:27:02:00:05:28:02:07:D0:36:01:FF:40:01:00)(option-definition-set-name ViasatUT))])) (6) update control { But this one is not, (15) if ( "%{control:Tmp-String-7}" =~ /vendor-options.*\(number 43\)\(value (([0-9a-fA-F]{2}:)*[0-9a-fA-F]{2})/ ) { (15) EXPAND %{control:Tmp-String-7} (15) --> ((ClassName Policy)(name client-policy:1,6,00:A0:BC:6C:7D:3A)(v4-reply-options [vendor-encapsulated-options])(vendor-options [((ClassName Option)(number 43)(value 01:03:00:A0:BC:02:09:55:54:00:00:00:00:00:00:07:03:0E:55:54:32:00:00:00:00:00:03:07:03:0A:00:09:04:11:55:54:5F:33:2E:37:2E:33:2E:31:30:2E:39:2E:62:69:6E:05:04:0A:4F:FF:0F:14:44:01:00:02:01:03:11:05:00:44:00:44:07:00:43:00:43:01:01:02:01:03:06:07:01:BD:01:BD:01:01:02:01:07:00:87:00:88:01:01:02:01:06:C0:A8:64:00:18:07:00:16:00:17:01:01:02:01:03:11:06:C0:A8:64:00:18:07:00:A1:00:A1:19:01:01:26:42:68:74:74:70:3A:2F:2F:61:63:73:2E:64:65:76:2E:63:6D:74:2E:76:69:61:73:61:74:2E:69:6F:3A:39:36:37:35:2F:6C:69:76:65:2F:43:50:45:4D:61:6E:61:67:65:72:2F:43:50:45:73:2F:67:65:6E:65:72:69:63:54:52:36:39:27:02:00:05:28:02:07:D0:2A:0E:55:54:2E:35:2E:32:2E:32:2E:31:30:35:30:33:2B:04:0A:4F:FF:0F:2C:0E:55:54:2E:35:2E:32:2E:32:2E:31:30:33:39:33:33:0C:55:54:32:00:00:00:00:00:00:00:29:08:36:01:FF:3B:0E:55:54:32:00:00:00:00:00:03:07:03:0A:00:09:3C:12:55:54:32:5F:33:2E:37:2E:33:2E:31:30:2E:39:2E:62:69:6E:3D:04:0A:4F:FF:0F:3E:3C:68:74:74:70:3A:2F:2F:31:30:2E:37:39:2E:32:35:35:2E:31:36:2F:70:75:62:2F:76:77:61:5F:69:6D:61:67:65:73:2F:76:77:61:5F:55:54:2E:35:2E:32:2E:32:2E:31:30:35:30:33:2E:74:61:72:2E:67:7A:3F:3C:68:74:74:70:3A:2F:2F:31:30:2E:37:39:2E:32:35:35:2E:31:36:2F:70:75:62:2F:76:77:61:5F:69:6D:61:67:65:73:2F:76:77:61:5F:55:54:2E:35:2E:32:2E:32:2E:31:30:33:39:33:2E:74:61:72:2E:67:7A:40:01:00)(option-definition-set-name ViasatUT))])) (15) ERROR: regex failed: regex evaluation failed with code (-27): <INVALID> (15) ERROR: Condition evaluation failed because the value of an operand could not be determined (15) ... (15) } Both are same conditions with different values in them. Why second one is not working? Regards, Nagamani Chinnapaiyan