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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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Berry
4 days ago
I lean towards A too. It’s a common mistake in views.
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Carmen
9 days ago
C could also be a problem. Missing syntax happens often.
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Andree
14 days ago
True, but I feel A is more likely the root cause.
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Hyman
19 days ago
But what about B? Large data can slow things down.
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Ocie
24 days ago
I agree, A makes sense. Primary key is crucial.
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Viola
29 days ago
I think it's A. No primary key can cause issues.
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Iluminada
1 month ago
I thought it was just a timeout issue, but maybe B is a factor too.
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Elbert
1 month ago
Definitely A, I've seen that issue before.
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Daniel
1 month ago
Wait, is it really C? A syntax error seems too simple for this.
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Refugia
2 months ago
I disagree, it could be B, large data sets can slow things down.
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Yaeko
2 months ago
It's probably A, no primary key mapping can mess things up.
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Sharita
2 months ago
I've seen this error before, it's usually A) for sure.
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Margart
2 months ago
Wait, is it really A)? I thought missing syntax would be more common.
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Bok
2 months ago
Nah, I disagree with B), it shouldn't cause an error like that.
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Ivette
4 months ago
I think B) could be a factor too, large data sets can slow things down.
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Dalene
4 months ago
A) is definitely the issue, no primary key mapping.
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Irene
5 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
5 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
5 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
5 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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