Specify older LF target version for DAZL tests

Questions
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1

How can I enforce DAML assistant to build DAR with LF version 1.6?

Trying to write an integration test for our DAZL bot, and the sandbox says:

Could not load package /…myapp-0.1.dar: Could not parse archive …: com.digitalasset.daml.lf.archive.Reader$ParseError: LF file V1.7 unsupported; maximum supported V1.x is V1.6
at com.digitalasset.platform.sandbox.SandboxServer.$anonfun$loadDamlPackages$4(SandboxServer.scala:310)

Started sandbox with: dazl.sandbox(dar, extra_args=None)

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2

You can add --target=1.6 to build-options in your daml.yaml file as in the following example:

sdk-version: 0.13.55
name: Everything
source: daml/TheAnswer.daml
parties:
  - Alice
  - Bob
exposed-modules:
  - TheAnswer
version: '42.0.0'
dependencies:
  - daml-prim
  - daml-stdlib
build-options:
  - --target=1.6
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3

You should probably start the sandbox using daml start instead of trying to start it through code. dazl.sandbox() was developed for a much earlier version of the SDK and no longer works properly with the most recent versions of the SDK. See https://github.com/digital-asset/dazl-client/issues/75 for more background on the problem. Sorry about that!

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4

Thanks Folks! Actually I can’t mark both answers from @dtanabe and @stefanobaghino-da as a Solution, but I’d like to :slight_smile:

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