获取每步图片

src/main/java/com/miniframe/bisiness/system/AFT001Service.java

@@ -162,6 +162,9 @@ public class AFT001Service extends AFT001BaseModel implements ExecProcessFlow {
 				msg.setParamJson(obj.toString());
 
 			}else if(solver.getSolverModel().equals("FEMLab（结构力学）")){
+				if(StringUtil.isNullOrEmpty(step)){
+					step ="1";
+				}
 				String jobPath = XIFileUtils.getRootPathStr()+ MFConstant.separator+solver.getPid();
 				String exePath = jobPath+ MFConstant.separator+"fem";
 				String exeOutPath = exePath+ MFConstant.separator+"data_out";