Error performing standard tasks: "Value does not fall within the expected range"

Product(s): WaterGEMS, WaterCAD, HAMMER, SewerGEMS, SewerCAD, StormCAD, CivilStorm, PondPack
Version(s): 08.11.XX.XX and 10.XX.XX.XX
Area: Modeling


When performing a standard task the following error message is generated.

"Value does not fall within the expected range."

Here are some examples of tasks that have led to this message:

  • Changing Scenarios
  • Computing or Validating
  • Changing Demands


This issue has been known to occur if annotations in the Element Symbology reference selection sets that have been deleted. If this occurs in a model, edit the annotation to either include all elements or a current selection set.

If that doesn't help, try the following steps:

1. Compact Database

a. Close the model files but leave the program open.

b. Go to Tools > Database Utilities > Compact Database and select the database file.

c. Choose the selection to purge the database to save space.

d. Try opening the model.

2. Move .wtg and .sqlite files to a new folder

Note: At times, one of the supporting files can cause an issue when opening a model. 

a. Copy the water model files (.wtg, and .sqlite) or sewer model files (.stsw, and .sqlite).

b. Paste them into a new folder on a local drive.

3. Import the database file into a new drawing

a. Close the model files but leave the program open.

b. Go to File > Import > WaterGEMS/WaterCAD/SewerGEMS/SewerCAD database.

c. Select the database file associated with the model.

4. Restore a backup of the model

  • This process is explained in the following link.