Tool "Extension Tool" did not accept output from method "XYZ"
I have a test suite that includes 2 set-up tests, each using an Extension Tool with simple groovy scripts to obtain a JWT:
Set-Up 1: Set JWT Bearer Acquirer
Set-Up 2: Fetch Bearer Token
This test suite is stored under Tests Assets in my workspace, and then referenced in my project in any test suite for the tests which require a JWT (token then used in a header of a Rest client test).
Running this test suite directly from Test Assets results in fetched token, both set-up tests passed and marked green.
Running this test suite reference from my project results in fetched token, but both set-up tests fail and marked red.
Both tests fail with error - Tool "Extension Tool" did not accept output from method "XYZ"
What can be wrong with my setup? 
Answers
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Both tests fail with error - Tool "Extension Tool" did not accept output from method "XYZ"
What tool or tools do you have chained to your Extension tools? The error suggests you must have another Extension Tool chained to your Extension Tool, is that right? Does the chained extension Tool have a method named "accepts"? What is your "accepts" method doing? It must have returned something like "false" or "0" which signals the parent Extension Tool to report this error.
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Correct, I have chained extension tools under each setup test:
Those named "Return Value->Extension Tool" are empty, no methods are there:
"Return Value->JSON Data Bank" looks like this:
I don't have method "accepts" in neither of my setup tests.
What's weird is that the test passes just fine when I run it directly from the test assets, but the same test looks like a failed test case when I run it as referenced. I say it "looks like a failed test" because it does the job - I see freshly grabbed token
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Those named "Return Value->Extension Tool" are empty, no methods are there:
The error is complaining about the chained tool named "Extension Tool". You should either configure or remove the bad Extension Tool(s).
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