Dear colleagues,
I have a python script to read results from ODBs in Abaqus. More specifically, I am extracting the equivalent plastic strain PEEQ from different regions (sets previously defined).
For some files, I am getting the followng error: "rfm_ArrayRepr::rfm_ArrayRepr: Handle is not to an Array object in ODB/CAE file. File may be unusable".
When I rerun the job, the error disapears and the script works fine.
How can I avoid this?
Thanks in advance.
Fernando
Fernando Freire Ribeiro, the rfm_ArrayRepr class is likely responsible for representing arrays in the ODB/CAE file format. Here, It is telling you that the handle that was provided to the rfm_ArrayRepr constructor is not pointing to an Array object. A handle is a reference to an object in memory. In this case, the handle is supposed to be pointing to an Array object, but it is not. This could be because the memory address was not allocated correctly, or because the memory address has been overwritten with other data.
There may be an issue with the ODB (Output Database) file you're trying to read. This error typically occurs when the file is corrupted or contains invalid data that prevents it from being properly read by Abaqus or your Python script.
To avoid this error, you can implement some error handling and verification steps in your Python script. Here are a few suggestions:
1. Check the file existence: Before attempting to read the ODB file, you can use the `os.path.exists()` function to verify that the file exists. If the file doesn't exist, you can handle the error gracefully and take appropriate action.
2. Verify the file integrity: After confirming that the file exists, you can use Abaqus' built-in functionality to verify the integrity of the ODB file. This can be done using the `odbChecker` utility, which is a command-line tool provided by Abaqus. You can call this utility from your Python script using the `subprocess` module to check the integrity of the ODB file before attempting to read it. If the file fails the integrity check, you can handle the error accordingly.
3. Retry mechanism: If you encounter the error during the initial read attempt, you can implement a retry mechanism in your script. For example, you can catch the specific exception that is raised when the error occurs and then retry the operation after a short delay. This approach allows you to give Abaqus or the system some additional time to finalize the writing of the ODB file before attempting to read it again.
Here's an example code snippet that demonstrates these suggestions:
```python
import os
import subprocess
import time
odb_path = "path/to/your/odb/file.odb"
# Check if the file exists
if not os.path.exists(odb_path):
print("ODB file does not exist.")
# Handle the error or exit gracefully
exit()
# Verify file integrity using Abaqus odbChecker
odb_checker_cmd = "abaqus odbcheck integrity=high odb=" + odb_path
result = subprocess.run(odb_checker_cmd, shell=True, capture_output=True)
# Check the output of the odbChecker
if "ODB is not usable" in result.stdout.decode():
print("ODB file integrity check failed.")
# Handle the error or exit gracefully
exit()
# Retry mechanism
max_retries = 3
retry_delay = 1 # seconds
for retry in range(max_retries):
try:
# Your code to read the PEEQ data from ODB file
# ...
# If successful, break out of the retry loop
break
except Exception as e:
print("Error reading ODB file:", str(e))
# Wait for a short delay before retrying
time.sleep(retry_delay)
else:
# Retry limit exceeded, handle the error or exit gracefully
print("Exceeded maximum retries. Unable to read ODB file.")
exit()
# Continue with the rest of your script
# ...
```
By implementing these suggestions, you can handle the error gracefully, verify the integrity of the ODB file, and incorporate a retry mechanism to give the system enough time to finalize the writing of the ODB file before attempting to read it.
Hope it helps:credit AI
This error typically means that the ODB file from which the data is supposed to be extracted has not been created correctly or has become corrupted. Here are the suggested steps to resolve this issue:
https://caeassistant.com/product/python-scripting-in-abaqus-part1/
Hello. To resolve this issue, you can try the following methods:
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