Importing excel file into AWR

I guess this is coming due to column heading format. The column headings section, if present, provides additional information about the data columns of the file. If this section is present, you must specify a column heading for each data column. A column heading has the following format:

[name]([type][,units])

where [name] is the name of the column, [type] is the type of data and [units] is the units for the data. Each of the parts is optional, although the "(,)" and "," punctuation are required.

To know more check the help page:

AWR Design Environment User Guide > Data Files > Data File Formats

Thanks, this gives me the cause of the error.

The format must be checked inside AWR and the heading must be exactly like this

Excel usually adds (" ") for each word which AWR doesn't understand or adds unnecessary , between each value.