# Error while trying to annotate "must" statement
**URL:** https://dmap-community.ductus.global/t/error-while-trying-to-annotate-must-statement/3800
**Category:** YANG
**Created:** [September 3, 2021, 10:27am UTC](https://dmap-community.ductus.global/t/error-while-trying-to-annotate-must-statement/3800 "2021-09-03T10:27:49Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@harminder](https://dmap-community.ductus.global/u/harminder)
#### Post date: [September 3, 2021, 10:27am UTC](https://dmap-community.ductus.global/t/error-while-trying-to-annotate-must-statement/3800/1 "2021-09-03T10:27:49Z")
I am trying to annotate below “must” statement under leaf “port-name” in container port-reference
augment “/if:interfaces/if:interface” {
when “(if:type = ‘ianaift:ethernetCsmacd’) or
(if:type = ‘ianaift:l2vlan’)” {
description “Applies to ethernetCsmacd and l2vlan interfaces”;
}
description
“Augment the interface model with parameters for all
both ethernetCsmacd and l2vlan interfaces.”;
leaf mac-address {
type yang:mac-address;
```
description
"The MAC address of the interface.";
}
container port-reference {
description
"a port reference used by other O-RAN modules";
leaf port-name {
type leafref {
path '/hw:hardware/hw:component/hw:name';
}
**must "derived-from-or-self(deref(current())/../hw:class, 'ianahw:port')";**
```
}
}
]
Using the below annotate model
o-ran-interfaces-ann.yang
module o-ran-interfaces-ann {
namespace “urn:o-ran-interfaces-ann:1.0”;
prefix ointa;
import tailf-common {
prefix tailf;
}
import o-ran-interfaces {
prefix oint;
}
import iana-hardware {
prefix “ianahw”;
}
import ietf-interfaces {
prefix “if”;
}
import ietf-hardware {
prefix “hw”;
}
description
“Annotate model for o-ran-interfaces adds the callpoints necessary for using this module with ConfD.”;
```
tailf:annotate-module 'oint'{
tailf:annotate-statement augment[7]{
tailf:annotate-statement container[name=‘port-reference’]{
tailf:annotate-statement leaf[name=‘port-name’] {
tailf:annotate-statement must {
tailf:dependency 'hw:hardware/hw:component/hw:class';
} } } } }
```
}
now facing below **error** when trying to build fxs using below command
/root/confd/bin/confdc --fail-on-warnings -a o-ran-interfaces-ann.yang -c o-ran-interfaces.yang -o o-ran-interfaces.fxs --yangpath …/…/imported\_models/ --verbose
Generating .fxs file “o-ran-interfaces.fxs”
**o-ran-interfaces.yang:399: error: The ‘must’ expression should have a tailf:dependency. If is doesn’t, it will be checked for every commit.**
when I add the tailf:dependency into the main yang itself, it is working fine.
what am i missing?
---
### Author:  [@mvf](https://dmap-community.ductus.global/u/mvf)
#### Post date: [September 3, 2021, 2:49pm UTC](https://dmap-community.ductus.global/t/error-while-trying-to-annotate-must-statement/3800/2 "2021-09-03T14:49:24Z")
There are two issues in your annotate statements:
- The module name is most likely not `oint`, I assume it should be `o-ran-interfaces`. This should be reported by the compiler, but the ConfD compiler prior to the release 7.5 does not report this kind of mistake. As a result, it appears as if the annotation was accepted, but it is actually silently ignored.
- The dependency should be `/hw:hardware/...`, note that you are using a relative path. The compile would complain about that if the `annotate-module` was correct.
---
### Author:  [@harminder](https://dmap-community.ductus.global/u/harminder)
#### Post date: [September 6, 2021, 5:08am UTC](https://dmap-community.ductus.global/t/error-while-trying-to-annotate-must-statement/3800/3 "2021-09-06T05:08:02Z")
> [@mvf](#):
>
> note that you are using a relative path.
module o-ran-interfaces-ann {
namespace “urn:o-ran-interfaces-ann:1.0”;
prefix ointa;
import tailf-common {
prefix tailf;
}
//import o-ran-interfaces {
// prefix oint;
// }
import iana-hardware {
prefix “ianahw”;
}
import ietf-interfaces {
prefix “if”;
}
import ietf-hardware {
prefix “hw”;
}
```
description
"Annotate model for o-ran-interfaces adds the callpoints necessary for using this module with ConfD.";
tailf:annotate-module "o-ran-interface"{
tailf:annotate-statement augment[7]{
tailf:annotate-statement container[name=‘port-reference’]{
tailf:annotate-statement leaf[name=‘port-name’] {
tailf:annotate-statement must {
tailf:dependency '/hw:hardware/hw:component/hw:class';
}
}
}
}
```
}
}
tried with the suggested “o-ran-interface” but still the same ERROR
[root@C7LabMachine interfaces]# /root/confd/bin/confdc --fail-on-warnings -a o-ran-interfaces-ann.yang -c o-ran-interfaces.yang -o o-ran-interfaces.fxs --yangpath …/…/imported\_models/
o-ran-interfaces.yang:399: error: The ‘must’ expression should have a tailf:dependency. If is doesn’t, it will be checked for every commit.
NOte: using 7.3 version
---
### Author:  [@cohult](https://dmap-community.ductus.global/u/cohult)
#### Post date: [September 6, 2021, 8:41am UTC](https://dmap-community.ductus.global/t/error-while-trying-to-annotate-must-statement/3800/4 "2021-09-06T08:41:11Z")
> [@harminder](#):
>
> `must "derived-from-or-self(deref(current())/../hw:class, 'ianahw:port')";`
> [@harminder](#):
>
> ```auto
> tailf:annotate-statement must {
> tailf:dependency '/hw:hardware/hw:component/hw:class';
>
> }
>
> ```
should be
```auto
tailf:annotate-statement "must[condition=\"derived-from-or-self(deref(current())/../hw:class, 'ianahw:port')\"]" {
tailf:dependency "/hw:hardware/hw:component/hw:class";
}
```
---
### Author:  [@harminder](https://dmap-community.ductus.global/u/harminder)
#### Post date: [September 8, 2021, 4:55am UTC](https://dmap-community.ductus.global/t/error-while-trying-to-annotate-must-statement/3800/5 "2021-09-08T04:55:39Z")
thanks @cohult , working fine now.