SYMPTOM:
Rows with metric value in the order of 0.000000001 are eliminated by Analytical Engine in a report with view filter "metric different from 0" in Strategy.
The following steps demonstrate how to reproduce this issue in tutorial project:
Create Table Table1 (Column1 double);
Insert into Table1 Values (0.00000000001);


CAUSE:
The cause for this issue is that the precision for columns with double data type is lower than 0.00000000001 in Strategy Analytical Engine.
ACTION:
Use big decimal instead of double as the data type for Column1 with steps below:



NOTE: Fore more details about big decimal data type, please refer to the following article:
KB11195: Precision is lost when Analytical Engine calculations are performed on Big Decimal datatypes in MicroStrategy