New@SSIS - Excel Src: The value could not be converted because of a potential loss of data

Question

Good day,
I am currently working on a SSIS package that had been built by a previous user. That Package allows me to import data from an excel source to a SQL table. The excel sheet holds multiple columns, However I am having difficulty with one
column when running the package.
The column rows hold a character and an integer (eg: N2). The data types are as follows:
SQL – varchar(3),NULL
SSIS - double-precision float [DT_R8]
I then inserted a data conversion task to change the data type. The task holds the following properties:
Input column – F6
Output Alias – Copy of F6
Data Type – string[DT_STR]
Length – 50
When I execute the package I receive the following error:”
[Excel Source Data [76]] Error: There was an error with output column "F6" (91) on output "Excel Source Output" (85). The column status returned was: "The value could not be converted because
of a potential loss of data.".
I do know that usually the message "The value could not be converted because of a potential loss of data." refers to a data type or length problem.
Further insight to this problem will be much appreciated.

Answer 1

Hi Zahid01,
From the error message you post, we can infer the issue is caused by the input column “F6” cannot convert to the output column in Excel Source.
Based on my test, I can reproduce the issue in my environment. The exactly cause is the data type of input column “F6” cannot convert to the data type of corresponding output column. For example, the data type of input column “F6” is [DT_STR], the data type
of corresponding output column is [DT_I4], and there are some nonnumeric values in the input column “F6”. When we execute the task, the error occurs. We can verify the issue in the Advanced Editor dialog box of Excel Source. The following screenshot is for
your reference:
To avoid this issue, please make sure the input column can convert to the output column in Excel Source, including all the values in the input column.
If there are any other questions, please feel free to ask.
Thanks,
Katherine Xiong
Katherine Xiong
TechNet Community Support