导入失败,并显示以下消息：

- Executing (Error)
Messages
Error 0xc02020a1: Data Flow Task 1: Data conversion Failed. The data conversion for column "Description" returned status value 4 and status text "Text was truncated or one or more characters had no match in the target code page.".
 (sql Server Import and Export Wizard)

Error 0xc020902a: Data Flow Task 1: The "output column "Description" (14)" Failed because truncation occurred,and the truncation row disposition on "output column "Description" (14)" specifies failure on truncation. A truncation error occurred on the specified object of the specified component.
 (sql Server Import and Export Wizard)

Error 0xc0202092: Data Flow Task 1: An error occurred while processing file "C:\Users\rinaldo.tempo\Desktop\ICD10_Edition4_CodesAndTitlesAndMetadata_GB_20120401.txt" on data row 3.
 (sql Server Import and Export Wizard)

Error 0xc0047038: Data Flow Task 1: SSIS Error Code DTS_E_PRIMEOUTPUTFailed.  The PrimeOutput method on component "Source - ICD10_Edition4_CodesAndTitlesAndMetadata_GB_20120401_txt" (1) returned error code 0xC0202092.  The component returned a failure code when the pipeline engine called PrimeOutput(). The meaning of the failure code is defined by the component,but the error is fatal and the pipeline stopped executing.  There may be error messages posted before this with more information about the failure.
 (sql Server Import and Export Wizard)

错误消息告诉我,数据被截断,因为它被放置在“描述”列,其类型为nvarchar(max)！仔细观察输入数据,我会说这些说明永远不会超过2或300个字符,所以这是不成问题的.

任何人都可以建议这里有什么问题？