Hi Selcuk,
Go to import excel microflow store $rowCount value in the integer variable $storeRowCountValue.
Retrieve your currently imported data in the xpath select custom and in the
amount section just pass this variable $rowCountStoreValue and sort on the basis of currDateTime in decending order
Now you have exactly currently imported data
take a loop pass this list and iterate them
in the decision box check isMatch($Iterator/Amount, '^[0-9]+$') if this true do continue but if this false change the $IsDecimal(true)
create another boolean variable before this loop $Isdecimal(false) and change the variable value in the false condition $IsDecimal(true) and break this loop using break event.
Lastly Outside of this loop just take a decision in the decision check $IsDecimal=true means list have some decimal value just show a validation feedback please enter integer value and delete the retrieve list but if $ISDecimal=false means there have no decimal value just end the event with one show message successfully impo.
You can also give the row number where the actually user entered the decimal value with the help of another entity.
Hope you like the answer.