Semantic Error (SEM1024): A label with the name '...' does already exist.
To form a valid jump in FBD/LD, one or more jump objects (which is/are read within the graphical code network) and exactly one label (which is written within the graphical code network) with the same name are required. Jumps are also possible between different worksheets of the same POU.
In NOLD code worksheets, only the network label in the horizontal bar at the top of each code section can be used as jump label. No manual labels can be inserted in NOLD.
In an FBD worksheet, or in a POU (with several worksheets) of your project two labels with the same name exist. A label, however, must not be defined more than once, i.e., it must be unique within a POU.
The affected objects appear with a red background in the graphical worksheet.
Double-click the affected label and rename it. Keep in mind that jump and label must have the same name when renaming the label.