I am currently having this same problem. I have a field that should be varchar but when changed to that datatype during import process, no data will import (it is the first field). If I change it to integer datatype, the table does import with all data. However I must have it be varchar. Same error message. Here is copy of import log.
1:49:28 PM Thread (17) Import Started [12/30/2014 1:49:28 PM]
1:49:28 PM Thread (17) Processing “A1c Registry Removal List 12-14 UPLOAD TO TOAD.xlsx” into a new table U0104665.DM_EXC_DEC_2014
1:49:28 PM Thread (17) Dropping Table
1:49:28 PM Thread (17) Drop table U0104665.DM_EXC_DEC_2014 failed, error: ORA-00942: table or view does not exist
1:49:28 PM Thread (17) Creating table U0104665.DM_EXC_DEC_2014
1:49:28 PM Thread (17) CREATE TABLE U0104665.DM_EXC_DEC_2014 (“PATIENT MRN” NVARCHAR2(50) NOT NULL,
“PATIENT NAME” NVARCHAR2(59) NOT NULL,
“Date Removed” TIMESTAMP,
“Provider” NVARCHAR2(50),
“Not DM” INT,
“Deceased” INT,
“Moved/ No longer with practice” INT,
“Managed by Specialist” INT,
“Change PCP” NVARCHAR2(65),
“Community Clinic” NVARCHAR2(50), PRIMARY KEY (“PATIENT MRN”))
1:49:28 PM Thread (17) Importing 1 out of 1 files
1:49:28 PM Thread (17) Reading from file A1c Registry Removal List 12-14 UPLOAD TO TOAD.xlsx
1:49:29 PM Thread (17) Change Schema to U0104665
1:49:29 PM Thread (17) Inserting row 448 into table U0104665.DM_EXC_DEC_2014
1:49:29 PM Thread (17) Continuing import regardless of the error: Input string was not in a correct format.
1:49:29 PM Thread (17) 448 rows from file A1c Registry Removal List 12-14 UPLOAD TO TOAD.xlsx were processed.
1:49:29 PM Thread (17) A total of 0 out of 448 rows were imported to table DM_EXC_DEC_2014.
1:49:29 PM Thread (17) Failed importing 0 rows on step of Input string was not in a correct format.
1:49:29 PM Thread (17) Imported rows were rolled back.
1:49:29 PM Thread (17) Input string was not in a correct format.
1:49:29 PM Thread (17) Import Finished [12/30/2014 1:49:29 PM]
1:49:29 PM Thread (17) Import time: 00:00:00.7360000
I think it is pretty lame that this question has still not been answered. Hopefully someone can help me!