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Appian ACD201 Exam - Topic 4 Question 13 Discussion

You run a report on different employee transactions by using a View.You encounter the following error: "a!queryEntity: An error occurred while retrieving the data."What is the most likely root cause of this error?
A) The view doesn't have a column mapped as a primary key in its corresponding CDT.
B) The view contains a large number of rows, requiring more time to fetch the data.
C) The rule contains a missing syntax.

Appian ACD201 Exam - Topic 4 Question 13 Discussion

Actual exam question for Appian's ACD201 exam
Question #: 13
Topic #: 4
[All ACD201 Questions]

You run a report on different employee transactions by using a View.

You encounter the following error: "a!queryEntity: An error occurred while retrieving the data."

What is the most likely root cause of this error?

Show Suggested Answer Hide Answer
Suggested Answer: A

The most likely root cause is that the view doesn't have a column mapped as a primary key in its corresponding CDT. Appian requires a primary key mapping for querying views to ensure data integrity and identification.


by Stanford at Apr 09, 2026, 04:01 PM

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Yaeko
It's probably A, no primary key mapping can mess things up.
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Sharita
5 days ago
I've seen this error before, it's usually A) for sure.
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Margart
10 days ago
Wait, is it really A)? I thought missing syntax would be more common.
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Bok
15 days ago
Nah, I disagree with B), it shouldn't cause an error like that.
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Ivette
2 months ago
I think B) could be a factor too, large data sets can slow things down.
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Dalene
2 months ago
A) is definitely the issue, no primary key mapping.
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Irene
3 months ago
I feel like I read that if the CDT isn't set up correctly, it can lead to errors like this. So option A seems pretty likely to me.
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Shawnee
3 months ago
I practiced a question similar to this, and I think syntax errors in rules can also lead to data retrieval issues. Maybe that's what's happening here?
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Loren
3 months ago
I'm not entirely sure, but I think if the view has too many rows, it might just take longer to load. Could that be the problem?
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Glendora
3 months ago
I remember something about primary keys being crucial for Views. If there's no column mapped as a primary key, that could definitely cause issues.
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