After baml upgrade receiving: "No result from baml...
# helpj
jgasiorek
10/29/2025, 10:00 PMI upgraded the golang baml client from 0.211.2 to 0.212.0 and in our baml call with the most input tokens I am seeing this error:
"No result from baml - Please report this error to our team with BAML_LOG=info enabled so we can improve this error message"
The start of the response is:
Function AnswerQuery:
Client: Sonnet (claude-sonnet-4-5-20250929) - 29999ms. StopReason: unknown. Tokens(in/out): 8588/2
It then lists the full input but only part of the output.
After downgrading I no longer see this issue. Please advise on how to resolve this issue.
a
aaronv (BAML)
10/30/2025, 12:17 AMis there a code snippet that you have that reproduces this by any chance?
aaronv (BAML)
10/30/2025, 12:17 AMdo you stream out the response? or just regular call?
aaronv (BAML)
10/30/2025, 12:18 AMand you only saw this in that one call with most input tokens right, but some other ones did succeed?
j
jgasiorek
10/30/2025, 2:32 PM@aaronv (BAML) we are not using the streaming client but are using OnTick(). I only have seen this issue with the one call that has a fair number of tokens; the others succeeded fine
jgasiorek
10/30/2025, 2:32 PMi'll see if i can put together a failing test case
a
aaronv (BAML)
10/30/2025, 5:17 PMCC @Vaibhav (BAML 🐑)
v
Vaibhav (BAML 🐑)
10/30/2025, 5:34 PMThanks for the tag Aaron! @jgasiorek I’ll try a repro of this tonight or tmrw and share what I can find. I’ll try to make a large token query and also use ontick to mimic it!
Vaibhav (BAML 🐑)
10/30/2025, 5:35 PMI do have a hunch of what might be going on.
j
jgasiorek
10/30/2025, 5:41 PMThanks @Vaibhav (BAML 🐑) ! let me know if i can provide more details. Will hold off on the upgrade for now
v
Vaibhav (BAML 🐑)
10/30/2025, 7:13 PMThis next upgrade should identify this.
i could trigger it pretty easily by cancellations
https://github.com/BoundaryML/baml/pull/2679
Vaibhav (BAML 🐑)
10/30/2025, 7:13 PMso i think it perhaps a channel gets closed?
Vaibhav (BAML 🐑)
10/30/2025, 7:14 PMbut regardless you should get a much better error message going forward!
j
jgasiorek
10/30/2025, 7:17 PMThanks!
jgasiorek
11/03/2025, 3:37 PM@Vaibhav (BAML 🐑) Do you have an indea of when the version of baml with this additional logging will be released?
v
Vaibhav (BAML 🐑)
11/03/2025, 5:21 PMusually we go out every week! so it should be today or tmrw
a
aaronv (BAML)
11/05/2025, 7:10 AMhey there, i will be releasing tomorrow morning, pacific time.
j
jgasiorek
11/05/2025, 2:55 PMThanks!
a
aaronv (BAML)
11/06/2025, 7:46 AMit's released now! 0.213.0
j
jgasiorek
11/11/2025, 8:21 PM@aaronv (BAML) @Vaibhav (BAML 🐑) I just tested 0.213.0 but am still seeing "This should never happen - Please report this error to our team with BAML_LOG=info enabled so we can improve this error message". I set ran the app with
BAML_LOG=info go run ...jgasiorek
11/12/2025, 7:27 PMPlease let me know if you need any additional information to figure out this error. I will hold off on future baml updates until then.
a
aaronv (BAML)
11/13/2025, 12:39 AMwill let you know once we investigate this further
j
jgasiorek
11/17/2025, 2:54 PM@aaronv (BAML) any update on this?
v
Vaibhav (BAML 🐑)
11/17/2025, 10:56 PMhi @jgasiorek could you by chance DM me the function definition. Tried reproing and am not able to. Are you getting this everywhere? or just one a few of your functions?
Vaibhav (BAML 🐑)
11/17/2025, 11:02 PMvbv@boundaryml.com works as well. otherwise i will attempt another few ways to repro!