Read Bytes from File

[Master674]

<something used to be here... its gone now>

[_Mike]

istream::seekg - C++ Reference - See the error flag descriptions
If you aren't getting any errors then you simply have the wrong offset. 0x401000 looks like it might be a memory offset, not a file offset.

[Master674]

<something used to be here... its gone now>

[_Mike]

Since you realized your mistake I'll just mention a little hint about IDA In the bottom left corner of the view you have something similar to
"00000401 | 00401001" for the currently highlighted line.
The first number is the file offset and the 2nd is the corresponding memory offset.